21.74% is the change from 621 to 756
Calculation steps:
[( 756 - 621 ) ÷ 621] x 100 = 21.74%
Formula
Percentage change = [(756 - 621) / 621] x 100
Subtract the new number by the original number
756 - 621 = 135
135 ÷ 621 = 0.21739130434782608
0.21739130434782608 x 100 = 21.74%