20.25% is the change from 815 to 980
Calculation steps:
[( 980 - 815 ) ÷ 815] x 100 = 20.25%
Formula
Percentage change = [(980 - 815) / 815] x 100
Subtract the new number by the original number
980 - 815 = 165
165 ÷ 815 = 0.20245398773006135
0.20245398773006135 x 100 = 20.25%