-83.32% is the change from 977 to 163
Calculation steps:
[( 163 - 977 ) ÷ 977] x 100 = -83.32%
Formula
Percentage change = [(163 - 977) / 977] x 100
Subtract the new number by the original number
163 - 977 = -814
-814 ÷ 977 = -0.8331627430910952
-0.8331627430910952 x 100 = -83.32%