18.46% is the change from 650 to 770
Calculation steps:
[( 770 - 650 ) ÷ 650] x 100 = 18.46%
Formula
Percentage change = [(770 - 650) / 650] x 100
Subtract the new number by the original number
770 - 650 = 120
120 ÷ 650 = 0.18461538461538463
0.18461538461538463 x 100 = 18.46%