81 percent of what is 34

Question

81 percent of what is 34?

Answer 1

 81          34

  -     =      -

100          x

 

x=(34)(100)/(81) = 42

 

This means that 81% of 42 is 34.  Setting up a proportion is often helpful with these types of problems.

Answer 2

Translate "81 percent of what is 34?"

  let x = what

 

                81% of x = 34       percent means per 100

               (81/100)x = 34     "of" usually means multiply

                x = 34*(100/81)

                x = 42%     [rounded]

 

Checking does  81% *(42) = 34 ?   yes