1125% is the change from 80 to 980
Calculation steps:
[( 980 - 80 ) ÷ 80] x 100 = 1125%
Formula
Percentage change = [(980 - 80) / 80] x 100
Subtract the new number by the original number
980 - 80 = 900
900 ÷ 80 = 11.25
11.25 x 100 = 1125%
Example