640% is the change from 55 to 407
Calculation steps:
[( 407 - 55 ) ÷ 55] x 100 = 640%
Formula
Percentage change = [(407 - 55) / 55] x 100
Subtract the new number by the original number
407 - 55 = 352
352 ÷ 55 = 6.4
6.4 x 100 = 640%
Example