-14.3% is the change from 979 to 839
Calculation steps:
[( 839 - 979 ) ÷ 979] x 100 = -14.3%
Formula
Percentage change = [(839 - 979) / 979] x 100
Subtract the new number by the original number
839 - 979 = -140
-140 ÷ 979 = -0.14300306435137897
-0.14300306435137897 x 100 = -14.3%