542.42% is the change from 66 to 424
Calculation steps:
[( 424 - 66 ) ÷ 66] x 100 = 542.42%
Formula
Percentage change = [(424 - 66) / 66] x 100
Subtract the new number by the original number
424 - 66 = 358
358 ÷ 66 = 5.424242424242424
5.424242424242424 x 100 = 542.42%