-81.46% is the change from 917 to 170
Calculation steps:
[( 170 - 917 ) ÷ 917] x 100 = -81.46%
Formula
Percentage change = [(170 - 917) / 917] x 100
Subtract the new number by the original number
170 - 917 = -747
-747 ÷ 917 = -0.8146128680479825
-0.8146128680479825 x 100 = -81.46%