-98.44% is the change from 834 to 13
Calculation steps:
[( 13 - 834 ) ÷ 834] x 100 = -98.44%
Formula
Percentage change = [(13 - 834) / 834] x 100
Subtract the new number by the original number
13 - 834 = -821
-821 ÷ 834 = -0.9844124700239808
-0.9844124700239808 x 100 = -98.44%