Question

31,50 is 42% os what number

Answer 1

`(31,50)/(x)=(42)/(100)`

The right fraction represents the percentage; 42 over 100 (100 is the total), or 0.42.
The left fraction is the part number over the whole number. The whole number is unknown, so we use 'x'.



`(31.50)/(x) = (42)/(100)\\\\cross\ multiply\\\\31.50*100=3150\\42* x=42x\\\\3150=42x\\x=75`
Your answer is 75.