Answer
$2.8^o$
Work Step by Step
RECALL:
$1^o=60'$
Use the conversion rate above to obtain:
$\require{cancel}
2^o48'$
$\\=2^o + 48'
\\=2^o + 48' \left(\dfrac{1^o}{60'}\right)
\\=2^o + \cancel{48'}\color{blue}4 \left(\dfrac{1^o}{\cancel{60'}\color{blue}5}\right)
\\=2^o + \dfrac{4}{5}(1^o)
\\=2^o + 0.8^o
\\=2.8^o$