Question

Solve for b: b/15=66/90

Answer 1

times 15 both sides
b=990/90
b=99/9
b=11/1
b=11

Answer 2

First, you need to cross multiply. When you cross multiply, you should get:
90b = 990

Now divide both sides by 90 to get b by itself.

b = 11.

You should get an answer of: b = 11