2 ratios are said to be in proportion if a)they have same dinominator b) they are equal c)they have the same unit
Answers
Step-by-step explanation:
Ratios are used to compare quantities. Ratios help us to compare quantities and determine the relation between them. A ratio is a comparison of two similar quantities obtained by dividing one quantity by the other. Since a ratio is only a comparison or relation between quantities, it is an abstract number. For instance, the ratio of 6 miles to 3 miles is only 2, not 2 miles. Ratios are written with the” : “symbol.
If two quantities cannot be expressed in terms of the same unit, there cannot be a ratio between them. Hence to compare two quantities, the units must be the same.
Consider an example to find the ratio of 3 km to 300 m.First convert both the distances to the same unit.
So, 3 km = 3 × 1000 m = 3000 m.
Thus, the required ratio, 3 km : 300 m is 3000 : 300 = 10 : 1
Equivalent Ratios
Different ratios can also be compared with each other to know whether they are equivalent or not. To do this, we need to write the ratios in the form of fractions and then compare them by converting them to like fractions. If these like fractions are equal, we say the given ratios are equivalent. We can find equivalent ratios by multiplying or dividing the numerator and denominator by the same number. Consider an example to check whether the ratios 1 : 2 and 2 : 3 equivalent.
Answer:
ratio are said to be in proportion
(c) they have same unit