-9.8% is the change from 1000 to 902
Calculation steps:
[( 902 - 1000 ) ÷ 1000] x 100 = -9.8%
Formula
Percentage change = [(902 - 1000) / 1000] x 100
Subtract the new number by the original number
902 - 1000 = -98
-98 ÷ 1000 = -0.098
-0.098 x 100 = -9.8%