81.82% is the change from 220 to 400
Calculation steps:
[( 400 - 220 ) ÷ 220] x 100 = 81.82%
Formula
Percentage change = [(400 - 220) / 220] x 100
Subtract the new number by the original number
400 - 220 = 180
180 ÷ 220 = 0.8181818181818182
0.8181818181818182 x 100 = 81.82%