Respuesta :

If you are looking for the fraction of total income spent, the answer would be 7/8.

3/8, 2/5, 1/10
Make them similar fractions, use LCD (in this case, 40)

They become
15/40, 16/40, 4/40

Add
15/40 + 16/40 + 4/40

= 35/40, or, simplified, 7/8