90.63% is the change from 331 to 631
Calculation steps:
[( 631 - 331 ) ÷ 331] x 100 = 90.63%
Formula
Percentage change = [(631 - 331) / 331] x 100
Subtract the new number by the original number
631 - 331 = 300
300 ÷ 331 = 0.9063444108761329
0.9063444108761329 x 100 = 90.63%