56.5% is the change from 331 to 518
Calculation steps:
[( 518 - 331 ) ÷ 331] x 100 = 56.5%
Formula
Percentage change = [(518 - 331) / 331] x 100
Subtract the new number by the original number
518 - 331 = 187
187 ÷ 331 = 0.5649546827794562
0.5649546827794562 x 100 = 56.5%