21.72% is the change from 686 to 835
Calculation steps:
[( 835 - 686 ) ÷ 686] x 100 = 21.72%
Formula
Percentage change = [(835 - 686) / 686] x 100
Subtract the new number by the original number
835 - 686 = 149
149 ÷ 686 = 0.21720116618075802
0.21720116618075802 x 100 = 21.72%