31.58% is the change from 684 to 900
Calculation steps:
[( 900 - 684 ) ÷ 684] x 100 = 31.58%
Formula
Percentage change = [(900 - 684) / 684] x 100
Subtract the new number by the original number
900 - 684 = 216
216 ÷ 684 = 0.3157894736842105
0.3157894736842105 x 100 = 31.58%