3080% is the change from 20 to 636
Calculation steps:
[( 636 - 20 ) ÷ 20] x 100 = 3080%
Formula
Percentage change = [(636 - 20) / 20] x 100
Subtract the new number by the original number
636 - 20 = 616
616 ÷ 20 = 30.8
30.8 x 100 = 3080%
Example