48.31% is the change from 621 to 921
Calculation steps:
[( 921 - 621 ) ÷ 621] x 100 = 48.31%
Formula
Percentage change = [(921 - 621) / 621] x 100
Subtract the new number by the original number
921 - 621 = 300
300 ÷ 621 = 0.4830917874396135
0.4830917874396135 x 100 = 48.31%