512.12% is the change from 66 to 404
Calculation steps:
[( 404 - 66 ) ÷ 66] x 100 = 512.12%
Formula
Percentage change = [(404 - 66) / 66] x 100
Subtract the new number by the original number
404 - 66 = 338
338 ÷ 66 = 5.121212121212121
5.121212121212121 x 100 = 512.12%