-81.27% is the change from 913 to 171
Calculation steps:
[( 171 - 913 ) ÷ 913] x 100 = -81.27%
Formula
Percentage change = [(171 - 913) / 913] x 100
Subtract the new number by the original number
171 - 913 = -742
-742 ÷ 913 = -0.8127053669222344
-0.8127053669222344 x 100 = -81.27%