Question

if 15% of A=20% of B, then A:B=?​

Answer 1

Step-by-step explanation:

0.3A = 0.2B

Divide both sides by 0.3:

A = 0.06B

Since we don’t actually know the values of either A or B we can’t solve for either of them.

However, we can still express the two as a ratio: A:0.06B

Now, if we set just one of the variables to a number - say, 30 - then we can solve for both:

A = 30

0.3A = 0.2B

0.3*30 = 0.2B

9 = 0.2B

B = 45

Thus A:B = 30:45; reduce and you get A:B = 2:3