55 is 40% of what number?

Question

I need help in pre-algebra math and I'm in a time crunch.

Answer 1

Hy karkat,

 

let x be the number we wish to find.

 

0.40 x = 55

 

x = 137.5

 

 

Forty percent of 137.5 is 55.

Answer 2

You can work this out as a proportion:

 

55 is to x as 40 is to 100

 

55 → x

40 → 100

 

Cross multiply to get x

 

x = 55 · 100 / 40 = 137.5

 

55 is 40% of 137.5