-98.66% is the change from 973 to 13
Calculation steps:
[( 13 - 973 ) ÷ 973] x 100 = -98.66%
Formula
Percentage change = [(13 - 973) / 973] x 100
Subtract the new number by the original number
13 - 973 = -960
-960 ÷ 973 = -0.986639260020555
-0.986639260020555 x 100 = -98.66%