-98.59% is the change from 923 to 13
Calculation steps:
[( 13 - 923 ) ÷ 923] x 100 = -98.59%
Formula
Percentage change = [(13 - 923) / 923] x 100
Subtract the new number by the original number
13 - 923 = -910
-910 ÷ 923 = -0.9859154929577465
-0.9859154929577465 x 100 = -98.59%