Question

55 is 40% of what number?

Answer 1

Assume that 40 percent of X is 55 
This means X (40 / 100) = 55 
0.4 X = 55 
X = 55 / 0.4 
X = 137.5 
55 is 40 percent of 137.5

Answer 2

Simple just do 55/0.40 and that gets you 137.5
so 40% of 137.5=55 here is the proof 137.5x0.40=55

Answer is 137.5