-84.14% is the change from 977 to 155
Calculation steps:
[( 155 - 977 ) ÷ 977] x 100 = -84.14%
Formula
Percentage change = [(155 - 977) / 977] x 100
Subtract the new number by the original number
155 - 977 = -822
-822 ÷ 977 = -0.8413510747185261
-0.8413510747185261 x 100 = -84.14%