-85.39% is the change from 979 to 143
Calculation steps:
[( 143 - 979 ) ÷ 979] x 100 = -85.39%
Formula
Percentage change = [(143 - 979) / 979] x 100
Subtract the new number by the original number
143 - 979 = -836
-836 ÷ 979 = -0.8539325842696629
-0.8539325842696629 x 100 = -85.39%