-80.3% is the change from 863 to 170
Calculation steps:
[( 170 - 863 ) ÷ 863] x 100 = -80.3%
Formula
Percentage change = [(170 - 863) / 863] x 100
Subtract the new number by the original number
170 - 863 = -693
-693 ÷ 863 = -0.8030127462340672
-0.8030127462340672 x 100 = -80.3%