-69.53% is the change from 279 to 85
Calculation steps:
[( 85 - 279 ) ÷ 279] x 100 = -69.53%
Formula
Percentage change = [(85 - 279) / 279] x 100
Subtract the new number by the original number
85 - 279 = -194
-194 ÷ 279 = -0.6953405017921147
-0.6953405017921147 x 100 = -69.53%