bob's rent is 9 0ver 20 of his income. what percent of his income goes to pay the rent?

Question

here are my choices of answers

A) 40% B) 55% C) 45% D) 50%

Answer 1

very simple multiply both numbers to get his income to 100 percent which is by 5
thus it become 45 over 100
or 45% of 100%

Answer 2

This is too easy.

The answer is: C
And I did this without a calculator.

Answer 3

45% my 15yr old brother could answer that!