-90.51% is the change from 917 to 87
Calculation steps:
[( 87 - 917 ) ÷ 917] x 100 = -90.51%
Formula
Percentage change = [(87 - 917) / 917] x 100
Subtract the new number by the original number
87 - 917 = -830
-830 ÷ 917 = -0.9051254089422028
-0.9051254089422028 x 100 = -90.51%