-9.87% is the change from 902 to 813
Calculation steps:
[( 813 - 902 ) ÷ 902] x 100 = -9.87%
Formula
Percentage change = [(813 - 902) / 902] x 100
Subtract the new number by the original number
813 - 902 = -89
-89 ÷ 902 = -0.09866962305986696
-0.09866962305986696 x 100 = -9.87%