-98.46% is the change from 844 to 13
Calculation steps:
[( 13 - 844 ) ÷ 844] x 100 = -98.46%
Formula
Percentage change = [(13 - 844) / 844] x 100
Subtract the new number by the original number
13 - 844 = -831
-831 ÷ 844 = -0.9845971563981043
-0.9845971563981043 x 100 = -98.46%