-96.77% is the change from 403 to 13
Calculation steps:
[( 13 - 403 ) ÷ 403] x 100 = -96.77%
Formula
Percentage change = [(13 - 403) / 403] x 100
Subtract the new number by the original number
13 - 403 = -390
-390 ÷ 403 = -0.967741935483871
-0.967741935483871 x 100 = -96.77%