627.27% is the change from 55 to 400
Calculation steps:
[( 400 - 55 ) ÷ 55] x 100 = 627.27%
Formula
Percentage change = [(400 - 55) / 55] x 100
Subtract the new number by the original number
400 - 55 = 345
345 ÷ 55 = 6.2727272727272725
6.2727272727272725 x 100 = 627.27%