Question 185320
Let {{{a}}} = number of sailors
Let {{{b}}} = number of soldiers
Right away, you know there are 
less sailors than soldiers, since {{{4/5}}}
is smaller than {{{1}}}
Suppose you could actually have {{{4/5}}} of a
sailor? Then {{{(4/5)/1 = a/b}}} would be true
The problem says {{{a + b = 27}}}
If {{{a/b = 12/15}}}, then
{{{12 = (4/5)*15}}} and also
{{{12 + 15 = 27}}}