-90.32% is the change from 279 to 27
Calculation steps:
[( 27 - 279 ) ÷ 279] x 100 = -90.32%
Formula
Percentage change = [(27 - 279) / 279] x 100
Subtract the new number by the original number
27 - 279 = -252
-252 ÷ 279 = -0.9032258064516129
-0.9032258064516129 x 100 = -90.32%