21.03% is the change from 680 to 823
Calculation steps:
[( 823 - 680 ) ÷ 680] x 100 = 21.03%
Formula
Percentage change = [(823 - 680) / 680] x 100
Subtract the new number by the original number
823 - 680 = 143
143 ÷ 680 = 0.21029411764705883
0.21029411764705883 x 100 = 21.03%