-87.38% is the change from 103 to 13
Calculation steps:
[( 13 - 103 ) ÷ 103] x 100 = -87.38%
Formula
Percentage change = [(13 - 103) / 103] x 100
Subtract the new number by the original number
13 - 103 = -90
-90 ÷ 103 = -0.8737864077669902
-0.8737864077669902 x 100 = -87.38%