Question

If a : b= 5:8 and a = 20, find b.

Answer 1

b = 32

Explanation:

20/5 = 4

So for finding b, we have to multiply 8 * 4 which is 32.

Answer 2

32

Explanation:

a:b = 5:8 means a/b = 5/8

20/b = 5/8

Cross multiplication will give you b = 32