87.61% is the change from 331 to 621
Calculation steps:
[( 621 - 331 ) ÷ 331] x 100 = 87.61%
Formula
Percentage change = [(621 - 331) / 331] x 100
Subtract the new number by the original number
621 - 331 = 290
290 ÷ 331 = 0.8761329305135952
0.8761329305135952 x 100 = 87.61%