We want to write the ratio of 54 to 56 as a fraction in lowest terms. To do this we have to factorize the numbers and simplify the equals factors:
[tex]\begin{gathered} \frac{54}{56}=\frac{2\cdot27}{2\cdot28}=\frac{27}{28}=\frac{3\cdot3\cdot3}{4\cdot7} \\ In\text{ the last, we cannot simplify the factors, so the lowest terms are:} \\ \frac{54}{56}=\frac{27}{28} \end{gathered}[/tex]