-83.33% is the change from 108 to 18
Calculation steps:
[( 18 - 108 ) ÷ 108] x 100 = -83.33%
Formula
Percentage change = [(18 - 108) / 108] x 100
Subtract the new number by the original number
18 - 108 = -90
-90 ÷ 108 = -0.8333333333333334
-0.8333333333333334 x 100 = -83.33%