Question

The fractions a

3 and 7

b are equivalent to decimals that terminate. Which best describes the

product of a and b? [CBSE Question Bank]

(a) It is a prime number.

(b) It cannot be an odd number.

(c) It is of the form 21k, where k could be multiples of 7 or 9.

(d) It is of the form 21k, where k could be multiples of 2 or 5.​

Answer 1

Answer:

terminates

When the prime factorization of the denominator of a fraction has only factors of 2 and factors of 5, we can always express the decimal as terminating decimal. Reason is we can always multiply the denominator with required factors and make it to the power of 10 which will always result in a terminating decimal.

For example, 251 = 25×44= 100/4 =0.04

Answer 2

Answer:

3/a =7/b

Step-by-step explanation:

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