-98.58% is the change from 917 to 13
Calculation steps:
[( 13 - 917 ) ÷ 917] x 100 = -98.58%
Formula
Percentage change = [(13 - 917) / 917] x 100
Subtract the new number by the original number
13 - 917 = -904
-904 ÷ 917 = -0.9858233369683751
-0.9858233369683751 x 100 = -98.58%