65% is the change from 20 to 33
Calculation steps:
[( 33 - 20 ) ÷ 20] x 100 = 65%
Formula
Percentage change = [(33 - 20) / 20] x 100
Subtract the new number by the original number
33 - 20 = 13
13 ÷ 20 = 0.65
0.65 x 100 = 65%
Example