-42.02% is the change from 188 to 109
Calculation steps:
[( 109 - 188 ) ÷ 188] x 100 = -42.02%
Formula
Percentage change = [(109 - 188) / 188] x 100
Subtract the new number by the original number
109 - 188 = -79
-79 ÷ 188 = -0.42021276595744683
-0.42021276595744683 x 100 = -42.02%