93.05% is the change from 331 to 639
Calculation steps:
[( 639 - 331 ) ÷ 331] x 100 = 93.05%
Formula
Percentage change = [(639 - 331) / 331] x 100
Subtract the new number by the original number
639 - 331 = 308
308 ÷ 331 = 0.9305135951661632
0.9305135951661632 x 100 = 93.05%