-9.75% is the change from 903 to 815
Calculation steps:
[( 815 - 903 ) ÷ 903] x 100 = -9.75%
Formula
Percentage change = [(815 - 903) / 903] x 100
Subtract the new number by the original number
815 - 903 = -88
-88 ÷ 903 = -0.09745293466223699
-0.09745293466223699 x 100 = -9.75%