63.14% is the change from 331 to 540
Calculation steps:
[( 540 - 331 ) ÷ 331] x 100 = 63.14%
Formula
Percentage change = [(540 - 331) / 331] x 100
Subtract the new number by the original number
540 - 331 = 209
209 ÷ 331 = 0.6314199395770392
0.6314199395770392 x 100 = 63.14%