21.22% is the change from 688 to 834
Calculation steps:
[( 834 - 688 ) ÷ 688] x 100 = 21.22%
Formula
Percentage change = [(834 - 688) / 688] x 100
Subtract the new number by the original number
834 - 688 = 146
146 ÷ 688 = 0.21220930232558138
0.21220930232558138 x 100 = 21.22%