590.91% is the change from 66 to 456
Calculation steps:
[( 456 - 66 ) ÷ 66] x 100 = 590.91%
Formula
Percentage change = [(456 - 66) / 66] x 100
Subtract the new number by the original number
456 - 66 = 390
390 ÷ 66 = 5.909090909090909
5.909090909090909 x 100 = 590.91%