-88.09% is the change from 915 to 109
Calculation steps:
[( 109 - 915 ) ÷ 915] x 100 = -88.09%
Formula
Percentage change = [(109 - 915) / 915] x 100
Subtract the new number by the original number
109 - 915 = -806
-806 ÷ 915 = -0.8808743169398907
-0.8808743169398907 x 100 = -88.09%