72.1% is the change from 319 to 549
Calculation steps:
[( 549 - 319 ) ÷ 319] x 100 = 72.1%
Formula
Percentage change = [(549 - 319) / 319] x 100
Subtract the new number by the original number
549 - 319 = 230
230 ÷ 319 = 0.7210031347962382
0.7210031347962382 x 100 = 72.1%