-98.9% is the change from 911 to 10
Calculation steps:
[( 10 - 911 ) ÷ 911] x 100 = -98.9%
Formula
Percentage change = [(10 - 911) / 911] x 100
Subtract the new number by the original number
10 - 911 = -901
-901 ÷ 911 = -0.9890230515916575
-0.9890230515916575 x 100 = -98.9%