-90.79% is the change from 717 to 66
Calculation steps:
[( 66 - 717 ) ÷ 717] x 100 = -90.79%
Formula
Percentage change = [(66 - 717) / 717] x 100
Subtract the new number by the original number
66 - 717 = -651
-651 ÷ 717 = -0.9079497907949791
-0.9079497907949791 x 100 = -90.79%