19.1% is the change from 686 to 817
Calculation steps:
[( 817 - 686 ) ÷ 686] x 100 = 19.1%
Formula
Percentage change = [(817 - 686) / 686] x 100
Subtract the new number by the original number
817 - 686 = 131
131 ÷ 686 = 0.19096209912536444
0.19096209912536444 x 100 = 19.1%