-14.84% is the change from 128 to 109
Calculation steps:
[( 109 - 128 ) ÷ 128] x 100 = -14.84%
Formula
Percentage change = [(109 - 128) / 128] x 100
Subtract the new number by the original number
109 - 128 = -19
-19 ÷ 128 = -0.1484375
-0.1484375 x 100 = -14.84%