515.15% is the change from 66 to 406
Calculation steps:
[( 406 - 66 ) ÷ 66] x 100 = 515.15%
Formula
Percentage change = [(406 - 66) / 66] x 100
Subtract the new number by the original number
406 - 66 = 340
340 ÷ 66 = 5.151515151515151
5.151515151515151 x 100 = 515.15%