1220% is the change from 20 to 264
Calculation steps:
[( 264 - 20 ) ÷ 20] x 100 = 1220%
Formula
Percentage change = [(264 - 20) / 20] x 100
Subtract the new number by the original number
264 - 20 = 244
244 ÷ 20 = 12.2
12.2 x 100 = 1220%
Example