-93.57% is the change from 280 to 18
Calculation steps:
[( 18 - 280 ) ÷ 280] x 100 = -93.57%
Formula
Percentage change = [(18 - 280) / 280] x 100
Subtract the new number by the original number
18 - 280 = -262
-262 ÷ 280 = -0.9357142857142857
-0.9357142857142857 x 100 = -93.57%