-14.94% is the change from 977 to 831
Calculation steps:
[( 831 - 977 ) ÷ 977] x 100 = -14.94%
Formula
Percentage change = [(831 - 977) / 977] x 100
Subtract the new number by the original number
831 - 977 = -146
-146 ÷ 977 = -0.14943705220061412
-0.14943705220061412 x 100 = -14.94%