-83.65% is the change from 997 to 163
Calculation steps:
[( 163 - 997 ) ÷ 997] x 100 = -83.65%
Formula
Percentage change = [(163 - 997) / 997] x 100
Subtract the new number by the original number
163 - 997 = -834
-834 ÷ 997 = -0.8365095285857572
-0.8365095285857572 x 100 = -83.65%