52.87% is the change from 331 to 506
Calculation steps:
[( 506 - 331 ) ÷ 331] x 100 = 52.87%
Formula
Percentage change = [(506 - 331) / 331] x 100
Subtract the new number by the original number
506 - 331 = 175
175 ÷ 331 = 0.5287009063444109
0.5287009063444109 x 100 = 52.87%