23.99% is the change from 621 to 770
Calculation steps:
[( 770 - 621 ) ÷ 621] x 100 = 23.99%
Formula
Percentage change = [(770 - 621) / 621] x 100
Subtract the new number by the original number
770 - 621 = 149
149 ÷ 621 = 0.23993558776167473
0.23993558776167473 x 100 = 23.99%