Question

Setting 7 over 3 equal to which ratio would result in a valid proportion?

9 over 4
18 over 42
42 over 18
49 over 9

Answer 1

42 over 18

Explanation:

Notice that the quotient 42 over 18 can be written in factor form as:

(2 * 3 * 7) / (2 * 3 * 3) and therefore, a pair of "2" factors and a pair of "3" factors from numerator and denominator can be cancelled, leaving the ratio 7 / 3 which is the one we were discussing.