-83.83% is the change from 977 to 158
Calculation steps:
[( 158 - 977 ) ÷ 977] x 100 = -83.83%
Formula
Percentage change = [(158 - 977) / 977] x 100
Subtract the new number by the original number
158 - 977 = -819
-819 ÷ 977 = -0.8382804503582395
-0.8382804503582395 x 100 = -83.83%