2350% is the change from 40 to 980
Calculation steps:
[( 980 - 40 ) ÷ 40] x 100 = 2350%
Formula
Percentage change = [(980 - 40) / 40] x 100
Subtract the new number by the original number
980 - 40 = 940
940 ÷ 40 = 23.5
23.5 x 100 = 2350%
Example