Question 49765
Write the given ratio (# of students over # of teachers):

{{{27.5/1}}} Now write the proportion remembering to keep the same order...# of students over the # of teachers. Let x = the required number of students.

{{{27.5/1 = x/42}}} Multiply both sides by 42.
{{{1155 = x}}}

There are 1155 students.