507.58% is the change from 66 to 401
Calculation steps:
[( 401 - 66 ) ÷ 66] x 100 = 507.58%
Formula
Percentage change = [(401 - 66) / 66] x 100
Subtract the new number by the original number
401 - 66 = 335
335 ÷ 66 = 5.075757575757576
5.075757575757576 x 100 = 507.58%