-81.52% is the change from 920 to 170
Calculation steps:
[( 170 - 920 ) ÷ 920] x 100 = -81.52%
Formula
Percentage change = [(170 - 920) / 920] x 100
Subtract the new number by the original number
170 - 920 = -750
-750 ÷ 920 = -0.8152173913043478
-0.8152173913043478 x 100 = -81.52%