[tex]62 \frac{3}{4}*60=62*60+ \frac{3}{4}*60= 3720 + 3*15=3720+45=\boxed{3765} \\ \\ 870 \ minutes= \frac{870}{60}= \frac{87}{6}=14 \frac{3}{6}=\boxed{ 14\frac{1}{2} } \ hours \\\\225 \ minutes= \frac{225}{60}= \frac{15}{4}=\boxed{ 3\frac{3}{4} } \ hours \\\\75 \ minutes= \frac{75}{60}= \frac{5}{4}=\boxed{ 1\frac{1}{4} } \ hours \\\\720 \ minutes= \frac{720}{60}= \frac{72}{6}=\boxed{ 12 } \ hours[/tex]
