545.45% is the change from 66 to 426
Calculation steps:
[( 426 - 66 ) ÷ 66] x 100 = 545.45%
Formula
Percentage change = [(426 - 66) / 66] x 100
Subtract the new number by the original number
426 - 66 = 360
360 ÷ 66 = 5.454545454545454
5.454545454545454 x 100 = 545.45%