-93.68% is the change from 285 to 18
Calculation steps:
[( 18 - 285 ) ÷ 285] x 100 = -93.68%
Formula
Percentage change = [(18 - 285) / 285] x 100
Subtract the new number by the original number
18 - 285 = -267
-267 ÷ 285 = -0.9368421052631579
-0.9368421052631579 x 100 = -93.68%