55.5% is the change from 400 to 622
Calculation steps:
[( 622 - 400 ) ÷ 400] x 100 = 55.5%
Formula
Percentage change = [(622 - 400) / 400] x 100
Subtract the new number by the original number
622 - 400 = 222
222 ÷ 400 = 0.555
0.555 x 100 = 55.5%
Example