18.29% is the change from 820 to 970
Calculation steps:
[( 970 - 820 ) ÷ 820] x 100 = 18.29%
Formula
Percentage change = [(970 - 820) / 820] x 100
Subtract the new number by the original number
970 - 820 = 150
150 ÷ 820 = 0.18292682926829268
0.18292682926829268 x 100 = 18.29%