[tex]1-\frac{7}{12}=\frac{12}{12}-\frac{7}{12}=\frac{5}{12}\\\\2-\frac{13}{15}=1\frac{15}{15}-\frac{13}{15}=1\frac{2}{15}\\\\5-\frac{18}{25}=4\frac{25}{25}-\frac{18}{25}=4\frac{7}{25}\\\\6-\frac{37}{40}=5\frac{40}{40}-\frac{37}{40}=5\frac{3}{40}[/tex]
