822.73% is the change from 66 to 609
Calculation steps:
[( 609 - 66 ) ÷ 66] x 100 = 822.73%
Formula
Percentage change = [(609 - 66) / 66] x 100
Subtract the new number by the original number
609 - 66 = 543
543 ÷ 66 = 8.227272727272727
8.227272727272727 x 100 = 822.73%