-93.55% is the change from 279 to 18
Calculation steps:
[( 18 - 279 ) ÷ 279] x 100 = -93.55%
Formula
Percentage change = [(18 - 279) / 279] x 100
Subtract the new number by the original number
18 - 279 = -261
-261 ÷ 279 = -0.9354838709677419
-0.9354838709677419 x 100 = -93.55%