-84.4% is the change from 109 to 17
Calculation steps:
[( 17 - 109 ) ÷ 109] x 100 = -84.4%
Formula
Percentage change = [(17 - 109) / 109] x 100
Subtract the new number by the original number
17 - 109 = -92
-92 ÷ 109 = -0.8440366972477065
-0.8440366972477065 x 100 = -84.4%