648.48% is the change from 66 to 494
Calculation steps:
[( 494 - 66 ) ÷ 66] x 100 = 648.48%
Formula
Percentage change = [(494 - 66) / 66] x 100
Subtract the new number by the original number
494 - 66 = 428
428 ÷ 66 = 6.484848484848484
6.484848484848484 x 100 = 648.48%