863.64% is the change from 66 to 636
Calculation steps:
[( 636 - 66 ) ÷ 66] x 100 = 863.64%
Formula
Percentage change = [(636 - 66) / 66] x 100
Subtract the new number by the original number
636 - 66 = 570
570 ÷ 66 = 8.636363636363637
8.636363636363637 x 100 = 863.64%