-14.12% is the change from 977 to 839
Calculation steps:
[( 839 - 977 ) ÷ 977] x 100 = -14.12%
Formula
Percentage change = [(839 - 977) / 977] x 100
Subtract the new number by the original number
839 - 977 = -138
-138 ÷ 977 = -0.14124872057318322
-0.14124872057318322 x 100 = -14.12%