24.19% is the change from 620 to 770
Calculation steps:
[( 770 - 620 ) ÷ 620] x 100 = 24.19%
Formula
Percentage change = [(770 - 620) / 620] x 100
Subtract the new number by the original number
770 - 620 = 150
150 ÷ 620 = 0.24193548387096775
0.24193548387096775 x 100 = 24.19%