-98.61% is the change from 936 to 13
Calculation steps:
[( 13 - 936 ) ÷ 936] x 100 = -98.61%
Formula
Percentage change = [(13 - 936) / 936] x 100
Subtract the new number by the original number
13 - 936 = -923
-923 ÷ 936 = -0.9861111111111112
-0.9861111111111112 x 100 = -98.61%