-49.54% is the change from 109 to 55
Calculation steps:
[( 55 - 109 ) ÷ 109] x 100 = -49.54%
Formula
Percentage change = [(55 - 109) / 109] x 100
Subtract the new number by the original number
55 - 109 = -54
-54 ÷ 109 = -0.4954128440366973
-0.4954128440366973 x 100 = -49.54%