SOLUTION: if 75% of a number is 120. What is 40% of the number?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: if 75% of a number is 120. What is 40% of the number?      Log On


   



Question 689296: if 75% of a number is 120. What is 40% of the number?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

75% of a number x is 120:


75% =75%2F100=0.75
so, 0.75x=120....solve for x
x=120%2F0.75
x=160........the number is 160

and now we can find 40% of the number 160
40%=40%2F100=0.40
0.40%2A160=x....solve for x
x=160%2A0.40
x=64