-98.66% is the change from 972 to 13
Calculation steps:
[( 13 - 972 ) ÷ 972] x 100 = -98.66%
Formula
Percentage change = [(13 - 972) / 972] x 100
Subtract the new number by the original number
13 - 972 = -959
-959 ÷ 972 = -0.9866255144032922
-0.9866255144032922 x 100 = -98.66%