2d array which each element is fraction

[ARWA]

hi every one;
i saw this question and im trying to solve it.\
baseicaly i have to matrix's which each element is afraction
so i must declare a class that has in the privet to float members numerator and denomnator
and in the public i have constructer function to inilize the arrays
and function subtract ,multiply,and add,.
and im asked to add the 2 matrix and subtract them...

sample input:
3/2 4/5 1/4
4/9 7/9 2/4
and the other matrix has the same format...
note that each function has parameter (2 fractions)

i just need som idea how to solve this problem??
i now the basic but when it comes to functions i feel confused and
i dont know how to complet..

thanks in advance.