54.75% is the change from 621 to 961
Calculation steps:
[( 961 - 621 ) ÷ 621] x 100 = 54.75%
Formula
Percentage change = [(961 - 621) / 621] x 100
Subtract the new number by the original number
961 - 621 = 340
340 ÷ 621 = 0.5475040257648953
0.5475040257648953 x 100 = 54.75%