19.51% is the change from 820 to 980
Calculation steps:
[( 980 - 820 ) ÷ 820] x 100 = 19.51%
Formula
Percentage change = [(980 - 820) / 820] x 100
Subtract the new number by the original number
980 - 820 = 160
160 ÷ 820 = 0.1951219512195122
0.1951219512195122 x 100 = 19.51%