21.2% is the change from 684 to 829
Calculation steps:
[( 829 - 684 ) ÷ 684] x 100 = 21.2%
Formula
Percentage change = [(829 - 684) / 684] x 100
Subtract the new number by the original number
829 - 684 = 145
145 ÷ 684 = 0.21198830409356725
0.21198830409356725 x 100 = 21.2%