-0.99% is the change from 911 to 902
Calculation steps:
[( 902 - 911 ) ÷ 911] x 100 = -0.99%
Formula
Percentage change = [(902 - 911) / 911] x 100
Subtract the new number by the original number
902 - 911 = -9
-9 ÷ 911 = -0.009879253567508232
-0.009879253567508232 x 100 = -0.99%