Answer :
we have
[tex]3\cdot5\frac{1}{4}[/tex]step 1
Convert mixed number to an improper fraction
5 1/4=5+1/4=21/4
substitute
[tex]3\cdot\frac{21}{4}=\frac{63}{4}[/tex]Convert to mixed number
63/4=60/4+3/4=15+3/4=15 3/4
therefore
we have
[tex]3\cdot5\frac{1}{4}[/tex]step 1
Convert mixed number to an improper fraction
5 1/4=5+1/4=21/4
substitute
[tex]3\cdot\frac{21}{4}=\frac{63}{4}[/tex]Convert to mixed number
63/4=60/4+3/4=15+3/4=15 3/4
therefore