-40.04% is the change from 979 to 587
Calculation steps:
[( 587 - 979 ) ÷ 979] x 100 = -40.04%
Formula
Percentage change = [(587 - 979) / 979] x 100
Subtract the new number by the original number
587 - 979 = -392
-392 ÷ 979 = -0.4004085801838611
-0.4004085801838611 x 100 = -40.04%