-72.48% is the change from 109 to 30
Calculation steps:
[( 30 - 109 ) ÷ 109] x 100 = -72.48%
Formula
Percentage change = [(30 - 109) / 109] x 100
Subtract the new number by the original number
30 - 109 = -79
-79 ÷ 109 = -0.7247706422018348
-0.7247706422018348 x 100 = -72.48%