-91.4% is the change from 279 to 24
Calculation steps:
[( 24 - 279 ) ÷ 279] x 100 = -91.4%
Formula
Percentage change = [(24 - 279) / 279] x 100
Subtract the new number by the original number
24 - 279 = -255
-255 ÷ 279 = -0.9139784946236559
-0.9139784946236559 x 100 = -91.4%