81.36% is the change from 220 to 399
Calculation steps:
[( 399 - 220 ) ÷ 220] x 100 = 81.36%
Formula
Percentage change = [(399 - 220) / 220] x 100
Subtract the new number by the original number
399 - 220 = 179
179 ÷ 220 = 0.8136363636363636
0.8136363636363636 x 100 = 81.36%