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Which proportion is not true?

A. 2/3 = 4/6
B. 5/8 = 25/40
C. 9/10 = 81/90
D. 4/7 = 24/28

User Allen Shaw
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1 Answer

3 votes

Answer:

D. 4/7 = 24/28

Explanation:

In any proportion, the value of the numerator and denominator does not change if is multiplied by the same value.

We know that 4*6 = 24, so the numerator holds true. However, 7*6 is 42. In the same vein, 7*4 is 28, so the denominator would hold true. However, 4*4 is 16. Thus, the proportion has not been multiplied by the same value.

In order to get 24/28 from 4/7, you would have to multiply by 6/4, which is not the same value.

User Lisek
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