27.19% is the change from 684 to 870
Calculation steps:
[( 870 - 684 ) ÷ 684] x 100 = 27.19%
Formula
Percentage change = [(870 - 684) / 684] x 100
Subtract the new number by the original number
870 - 684 = 186
186 ÷ 684 = 0.2719298245614035
0.2719298245614035 x 100 = 27.19%