21.01% is the change from 809 to 979
Calculation steps:
[( 979 - 809 ) ÷ 809] x 100 = 21.01%
Formula
Percentage change = [(979 - 809) / 809] x 100
Subtract the new number by the original number
979 - 809 = 170
170 ÷ 809 = 0.21013597033374537
0.21013597033374537 x 100 = 21.01%