when 120 is decreasedby x percent , the result is 45. What is the value of x

Question

need help with 7th grade math home work

Answer 1

First, we should know the amount deducted to reach 45. which is 120-45= 75.

 

Then we calculate how much percent is the 75 out of the 120.

 

the answer is (75/120) *100 = 62.5 %