-98.44% is the change from 835 to 13
Calculation steps:
[( 13 - 835 ) ÷ 835] x 100 = -98.44%
Formula
Percentage change = [(13 - 835) / 835] x 100
Subtract the new number by the original number
13 - 835 = -822
-822 ÷ 835 = -0.9844311377245509
-0.9844311377245509 x 100 = -98.44%