What is 45% simplified in a fraction

45% is 45/100, divide that by 5 and you get 9/20

45% as a fraction is 9/20
Because: 
You first change 45% to a fraction as 45/100 which equals 0.45 as a decimal.
Then you 0.45 x 100 = 45/100 as a fraction.
Then you divide 45/100, the numerator and denominator by 5 and the answer is 9/20. 
I hope this helps :)

The variables should add up to equal 1