-80.56% is the change from 108 to 21
Calculation steps:
[( 21 - 108 ) ÷ 108] x 100 = -80.56%
Formula
Percentage change = [(21 - 108) / 108] x 100
Subtract the new number by the original number
21 - 108 = -87
-87 ÷ 108 = -0.8055555555555556
-0.8055555555555556 x 100 = -80.56%