-11.8% is the change from 915 to 807
Calculation steps:
[( 807 - 915 ) ÷ 915] x 100 = -11.8%
Formula
Percentage change = [(807 - 915) / 915] x 100
Subtract the new number by the original number
807 - 915 = -108
-108 ÷ 915 = -0.1180327868852459
-0.1180327868852459 x 100 = -11.8%