a number that can be written as a/b (a fancy word for a fraction)
Answers
CONJUNCTION
used between whole numbers and fractions
billionth NUMBER
one of a billion equal parts of something
common denominator NOUN
MATHS a number that can be divided exactly by all the denominators (=numbers written below the line) in a particular group of fractions. The common denominator of 1/4, 1/3, and 1/6 is 12.
common fraction NOUN
a fraction written as one number above a line and another number below the line, instead of as numbers separated by a decimal point. ¾ is a common fraction
denominator NOUN
the number that is below the line in a fraction. In ¾, 4 is the denominator. The number above the line is the numerator.
eighth NUMBER
one of 8 equal parts of something
eleventh NUMBER
one of 11 equal parts of something
fifteenth NUMBER
one of 15 equal parts of something
fifth NUMBER
one of 5 equal parts of something
fiftieth NUMBER
one of 50 equal parts of something
fortieth NUMBER
one of 40 equal parts of something
fourteenth NUMBER
one of 14 equal parts of something
fourth NUMBER
MAINLY AMERICAN one of 4 equal parts of something
fraction NOUN
MATHS a division or part of a whole number, for example ½ or ¾
fractional ADJECTIVE
relating to fractions
half ADJECTIVE
used for referring to one of two equal parts into which an amount, group, or object can be divided
half ADJECTIVE
used in numbers, measurements, and ages to mean ½
half ADJECTIVE
used for saying that someone or something is made up of 50% of one thing and 50% of something else
half as much/many again PHRASE
used for saying that an amount/a number is 50% greater than another amount/number
hundredth NUMBER
one of 100 equal parts of something
improper fraction NOUN
a fraction such as 9/4 in which the number above the line is larger than the number below it
LCD ABBREVIATION
lowest common denominator
lowest common denominator NOUN
MATHSBRITISH the lowest number that can be divided by the bottom numbers of a set of fractions
micro- PREFIX
SCIENCE one of a million equal parts of something: used with some nouns
milli- PREFIX
one of a thousand equal parts of something: used with many nouns
nineteenth NUMBER
one of 19 equal parts of something
ninetieth NUMBER
one of 90 equal parts of something
ninth NUMBER
one of nine equal parts of something
numerator NOUN
the number that appears above the line in a common fraction
one out of ten/99 out of 100 etc PHRASE
used for saying how large a part of a group or number you are talking about
proper fraction NOUN
a fraction in which the number above the line is smaller than the number below the line, for example ¼
quarter NOUN
MATHS one of four equal parts of something
seventeenth NUMBER
one of 17 equal parts of something
seventh NUMBER
one of 7 equal parts of something
seventieth NUMBER
one of 70 equal parts of something
sixteenth NUMBER
one of 16 equal parts of something
sixth NUMBER
one of 6 equal parts of something
sixtieth NUMBER
one of 60 equal parts of something
tenth NUMBER
one of ten equal parts of something
third
one of 3 equal parts of something
thirteenth NUMBER
one of 13 equal parts of something
thirtieth NUMBER
one of 30 equal parts of something
thousandth NUMBER
one of 1,000 equal parts of something
three-quarters NOUN
three of four equal parts of something
twelfth NUMBER
one of 12 equal parts of something
twentieth NUMBER
one of 20 equal parts of something
Answer:
fraction (from Latin fractus, "broken") represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters. A common, vulgar, or simple fraction (examples: {\displaystyle {\tfrac {1}{2}}}{\tfrac {1}{2}} and {\displaystyle {\tfrac {17}{3}}}{\displaystyle {\tfrac {17}{3}}}) consists of a numerator displayed above a line (or before a slash), and a non-zero denominator, displayed below (or after) that line. Numerators and denominators are also used in fractions that are not common, including compound fractions, complex fractions, and mixed numerals.
In positive common fractions, the numerator and denominator are natural numbers. The numerator represents a number of equal parts, and the denominator indicates how many of those parts make up a unit or a whole. The denominator cannot be zero because zero parts can never make up a whole. For example, in the fraction 3⁄4, the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole. The picture to the right illustrates {\displaystyle {\tfrac {3}{4}}}{\tfrac {3}{4}}or 3⁄4 of a cake.
A common fraction is a numeral which represents a rational number. That same number can also be represented as a decimal, a percent, or with a negative exponent. For example, 0.01, 1%, and 10−2 all equal the fraction 1/100. An integer such as the number 7 can be thought of as having an implicit denominator of one: 7 equals 7/1.
Other uses for fractions are to represent ratios and division.[1] Thus the fraction
3
/
4
is also used to represent the ratio 3:4 (the ratio of the part to the whole) and the division 3 ÷ 4 (three divided by four). The non-zero denominator in the case using a fraction to represent division is an example of the rule that division by zero is undefined.
We can also write negative fractions, which represent the opposite of a positive fraction. For example, if
1
/
2
represents a half dollar profit, then −
1
/
2
represents a half dollar loss. Because of the rules of division of signed numbers, which require that, for example, negative divided by positive is negative, −
1
/
2
,
–1
/
2
and
1
/
–2
, all represent the same fraction, negative one-half. Because a negative divided by a negative produces a positive,
–1
/
–2
represents positive one-half.
In mathematics the set of all numbers that can be expressed in the form a/b, where a and b are integers and b is not zero, is called the set of rational numbers and is represented by the symbol Q, which stands for quotient. The test for a number being a rational number is that it can be written in that form (i.e., as a common fraction). However, the word fraction is also used to describe mathematical expressions that are not rational numbers, for example algebraic fractions (quotients of algebraic expressions), and expressions that contain irrational numbers, such as √2/2 (see square root of 2) and π/4 (see proof that π is irrational).