800% is the change from 66 to 594
Calculation steps:
[( 594 - 66 ) ÷ 66] x 100 = 800%
Formula
Percentage change = [(594 - 66) / 66] x 100
Subtract the new number by the original number
594 - 66 = 528
528 ÷ 66 = 8
8 x 100 = 800%
Example