convert the mixed number to an improper fraction b mutliplying the whole number by the denonimator in the fraction and then adding it to the numerator like this
16 x 1 = 16
15+16=31
That gives you:
31/16 + 3/8
Now you need to find a common denominator which will be the smallest number that both of the bottom number will go into evenly. we know it must be at least 16 and 8 does go evenly into 16 so we can rewrite the problem like this
31 2*3
---- + -------
16 2*8
we multiply both the top and bottom of the second fraction by 2 since that will give up the common denominator of 16 we need
to simplify
31/16 + 6/16 = 36/16
this can be reduced or converted to mixed number
reduced form is 13/8
mixed number form is 1 5/8