-9.65% is the change from 902 to 815
Calculation steps:
[( 815 - 902 ) ÷ 902] x 100 = -9.65%
Formula
Percentage change = [(815 - 902) / 902] x 100
Subtract the new number by the original number
815 - 902 = -87
-87 ÷ 902 = -0.09645232815964523
-0.09645232815964523 x 100 = -9.65%