Answer :
To determine the percentage that 20 is from 50 we will use the following relationship:
[tex]P=\frac{20}{50}\times100_{}[/tex]Solving the operations:
[tex]P=\frac{2}{5}\times100=0.4\times100=40[/tex]Therefore, 20 is 40% of 50.
The base of a percentage is the whole. In this case, the base is 50 and the amount is 20.