4505% is the change from 20 to 921
Calculation steps:
[( 921 - 20 ) ÷ 20] x 100 = 4505%
Formula
Percentage change = [(921 - 20) / 20] x 100
Subtract the new number by the original number
921 - 20 = 901
901 ÷ 20 = 45.05
45.05 x 100 = 4505%
Example