72.41% is the change from 319 to 550
Calculation steps:
[( 550 - 319 ) ÷ 319] x 100 = 72.41%
Formula
Percentage change = [(550 - 319) / 319] x 100
Subtract the new number by the original number
550 - 319 = 231
231 ÷ 319 = 0.7241379310344828
0.7241379310344828 x 100 = 72.41%