20.15% is the change from 680 to 817
Calculation steps:
[( 817 - 680 ) ÷ 680] x 100 = 20.15%
Formula
Percentage change = [(817 - 680) / 680] x 100
Subtract the new number by the original number
817 - 680 = 137
137 ÷ 680 = 0.20147058823529412
0.20147058823529412 x 100 = 20.15%