64.95% is the change from 331 to 546
Calculation steps:
[( 546 - 331 ) ÷ 331] x 100 = 64.95%
Formula
Percentage change = [(546 - 331) / 331] x 100
Subtract the new number by the original number
546 - 331 = 215
215 ÷ 331 = 0.649546827794562
0.649546827794562 x 100 = 64.95%