22.06% is the change from 680 to 830
Calculation steps:
[( 830 - 680 ) ÷ 680] x 100 = 22.06%
Formula
Percentage change = [(830 - 680) / 680] x 100
Subtract the new number by the original number
830 - 680 = 150
150 ÷ 680 = 0.22058823529411764
0.22058823529411764 x 100 = 22.06%