-79.73% is the change from 977 to 198
Calculation steps:
[( 198 - 977 ) ÷ 977] x 100 = -79.73%
Formula
Percentage change = [(198 - 977) / 977] x 100
Subtract the new number by the original number
198 - 977 = -779
-779 ÷ 977 = -0.797338792221085
-0.797338792221085 x 100 = -79.73%