646.97% is the change from 66 to 493
Calculation steps:
[( 493 - 66 ) ÷ 66] x 100 = 646.97%
Formula
Percentage change = [(493 - 66) / 66] x 100
Subtract the new number by the original number
493 - 66 = 427
427 ÷ 66 = 6.46969696969697
6.46969696969697 x 100 = 646.97%