-86.02% is the change from 279 to 39
Calculation steps:
[( 39 - 279 ) ÷ 279] x 100 = -86.02%
Formula
Percentage change = [(39 - 279) / 279] x 100
Subtract the new number by the original number
39 - 279 = -240
-240 ÷ 279 = -0.8602150537634409
-0.8602150537634409 x 100 = -86.02%