Question

Alan mixes 1 1/3 cups of milk with a can of condensed soup. He makes a total of 2 5/8 cups of soup. How many cups of condensed soup were in the can?

Answer 1

What kind of soup needs milk? I don't know any...

anyway, the amount of the liquid at the end was 2 5/8 and milk was 1 1/3 - we need to substract the amount of milk from the amount of total liquid afterwards:

$2 \frac{5}{8} -1 \frac{1}{3}$
bring the fraction to the same form:
$2 \frac{15}{24} -1 \frac{8}{24}$

substracting:

$1 \frac{7}{24}}$

which is also the answer