The improper fraction will be - 34/3
Mixed fractions are expressed as [tex]a \frac{b}{c}[/tex], expressing as an improper fraction will give:
[tex]a\frac{b}{c} = \frac{(a\times c) + b}{c}[/tex]
Given the mixed fraction [tex]-11\frac{1}{3}[/tex], applying the formula above to express as an improper fraction will give:
[tex]-11\frac{1}{3} = -\frac{(11\times3)+1}{3} = \frac{-34}{3}[/tex]
Hence the improper fraction will be - 34/3
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