-85.93% is the change from 917 to 129
Calculation steps:
[( 129 - 917 ) ÷ 917] x 100 = -85.93%
Formula
Percentage change = [(129 - 917) / 917] x 100
Subtract the new number by the original number
129 - 917 = -788
-788 ÷ 917 = -0.8593238822246456
-0.8593238822246456 x 100 = -85.93%