45% is the change from 220 to 319
Calculation steps:
[( 319 - 220 ) ÷ 220] x 100 = 45%
Formula
Percentage change = [(319 - 220) / 220] x 100
Subtract the new number by the original number
319 - 220 = 99
99 ÷ 220 = 0.45
0.45 x 100 = 45%
Example