-91.43% is the change from 817 to 70
Calculation steps:
[( 70 - 817 ) ÷ 817] x 100 = -91.43%
Formula
Percentage change = [(70 - 817) / 817] x 100
Subtract the new number by the original number
70 - 817 = -747
-747 ÷ 817 = -0.9143206854345165
-0.9143206854345165 x 100 = -91.43%