20.49% is the change from 820 to 988
Calculation steps:
[( 988 - 820 ) ÷ 820] x 100 = 20.49%
Formula
Percentage change = [(988 - 820) / 820] x 100
Subtract the new number by the original number
988 - 820 = 168
168 ÷ 820 = 0.2048780487804878
0.2048780487804878 x 100 = 20.49%