-94.62% is the change from 279 to 15
Calculation steps:
[( 15 - 279 ) ÷ 279] x 100 = -94.62%
Formula
Percentage change = [(15 - 279) / 279] x 100
Subtract the new number by the original number
15 - 279 = -264
-264 ÷ 279 = -0.946236559139785
-0.946236559139785 x 100 = -94.62%