1150% is the change from 20 to 250
Calculation steps:
[( 250 - 20 ) ÷ 20] x 100 = 1150%
Formula
Percentage change = [(250 - 20) / 20] x 100
Subtract the new number by the original number
250 - 20 = 230
230 ÷ 20 = 11.5
11.5 x 100 = 1150%
Example