-83.78% is the change from 672 to 109
Calculation steps:
[( 109 - 672 ) ÷ 672] x 100 = -83.78%
Formula
Percentage change = [(109 - 672) / 672] x 100
Subtract the new number by the original number
109 - 672 = -563
-563 ÷ 672 = -0.8377976190476191
-0.8377976190476191 x 100 = -83.78%