68.97% is the change from 319 to 539
Calculation steps:
[( 539 - 319 ) ÷ 319] x 100 = 68.97%
Formula
Percentage change = [(539 - 319) / 319] x 100
Subtract the new number by the original number
539 - 319 = 220
220 ÷ 319 = 0.6896551724137931
0.6896551724137931 x 100 = 68.97%