-82.88% is the change from 993 to 170
Calculation steps:
[( 170 - 993 ) ÷ 993] x 100 = -82.88%
Formula
Percentage change = [(170 - 993) / 993] x 100
Subtract the new number by the original number
170 - 993 = -823
-823 ÷ 993 = -0.8288016112789527
-0.8288016112789527 x 100 = -82.88%