20.32% is the change from 684 to 823
Calculation steps:
[( 823 - 684 ) ÷ 684] x 100 = 20.32%
Formula
Percentage change = [(823 - 684) / 684] x 100
Subtract the new number by the original number
823 - 684 = 139
139 ÷ 684 = 0.20321637426900585
0.20321637426900585 x 100 = 20.32%