-98.37% is the change from 797 to 13
Calculation steps:
[( 13 - 797 ) ÷ 797] x 100 = -98.37%
Formula
Percentage change = [(13 - 797) / 797] x 100
Subtract the new number by the original number
13 - 797 = -784
-784 ÷ 797 = -0.9836888331242158
-0.9836888331242158 x 100 = -98.37%