19.27% is the change from 820 to 978
Calculation steps:
[( 978 - 820 ) ÷ 820] x 100 = 19.27%
Formula
Percentage change = [(978 - 820) / 820] x 100
Subtract the new number by the original number
978 - 820 = 158
158 ÷ 820 = 0.1926829268292683
0.1926829268292683 x 100 = 19.27%