-61.07% is the change from 280 to 109
Calculation steps:
[( 109 - 280 ) ÷ 280] x 100 = -61.07%
Formula
Percentage change = [(109 - 280) / 280] x 100
Subtract the new number by the original number
109 - 280 = -171
-171 ÷ 280 = -0.6107142857142858
-0.6107142857142858 x 100 = -61.07%