34.65% is the change from 684 to 921
Calculation steps:
[( 921 - 684 ) ÷ 684] x 100 = 34.65%
Formula
Percentage change = [(921 - 684) / 684] x 100
Subtract the new number by the original number
921 - 684 = 237
237 ÷ 684 = 0.34649122807017546
0.34649122807017546 x 100 = 34.65%