50.76% is the change from 331 to 499
Calculation steps:
[( 499 - 331 ) ÷ 331] x 100 = 50.76%
Formula
Percentage change = [(499 - 331) / 331] x 100
Subtract the new number by the original number
499 - 331 = 168
168 ÷ 331 = 0.5075528700906344
0.5075528700906344 x 100 = 50.76%