-81.04% is the change from 902 to 171
Calculation steps:
[( 171 - 902 ) ÷ 902] x 100 = -81.04%
Formula
Percentage change = [(171 - 902) / 902] x 100
Subtract the new number by the original number
171 - 902 = -731
-731 ÷ 902 = -0.8104212860310421
-0.8104212860310421 x 100 = -81.04%