656.06% is the change from 66 to 499
Calculation steps:
[( 499 - 66 ) ÷ 66] x 100 = 656.06%
Formula
Percentage change = [(499 - 66) / 66] x 100
Subtract the new number by the original number
499 - 66 = 433
433 ÷ 66 = 6.5606060606060606
6.5606060606060606 x 100 = 656.06%