\(2\frac{3}{12}\div1\frac1{12} \)
Convert the mixed numbers into improper fractions.
\(=\frac{27}{12}\div\frac{13}{12}\)
Keep the first fraction, change the operation from division to multiplication, flip the second fraction.
\(=\frac{27}{12}*\frac{12}{13}\)
Multiply the fractions and reduce.
\(=\frac{27*12}{12*13} \\~\\ =\frac{27}{13}\)
As a mixed number, this is \(2\frac1{13}\)