33.85% is the change from 650 to 870
Calculation steps:
[( 870 - 650 ) ÷ 650] x 100 = 33.85%
Formula
Percentage change = [(870 - 650) / 650] x 100
Subtract the new number by the original number
870 - 650 = 220
220 ÷ 650 = 0.3384615384615385
0.3384615384615385 x 100 = 33.85%