-86.59% is the change from 917 to 123
Calculation steps:
[( 123 - 917 ) ÷ 917] x 100 = -86.59%
Formula
Percentage change = [(123 - 917) / 917] x 100
Subtract the new number by the original number
123 - 917 = -794
-794 ÷ 917 = -0.8658669574700109
-0.8658669574700109 x 100 = -86.59%