-98.57% is the change from 911 to 13
Calculation steps:
[( 13 - 911 ) ÷ 911] x 100 = -98.57%
Formula
Percentage change = [(13 - 911) / 911] x 100
Subtract the new number by the original number
13 - 911 = -898
-898 ÷ 911 = -0.9857299670691547
-0.9857299670691547 x 100 = -98.57%