-88.99% is the change from 109 to 12
Calculation steps:
[( 12 - 109 ) ÷ 109] x 100 = -88.99%
Formula
Percentage change = [(12 - 109) / 109] x 100
Subtract the new number by the original number
12 - 109 = -97
-97 ÷ 109 = -0.8899082568807339
-0.8899082568807339 x 100 = -88.99%