-88% is the change from 100 to 12
Calculation steps:
[( 12 - 100 ) ÷ 100] x 100 = -88%
Formula
Percentage change = [(12 - 100) / 100] x 100
Subtract the new number by the original number
12 - 100 = -88
-88 ÷ 100 = -0.88
-0.88 x 100 = -88%
Example