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\frac{19L_{0}}{20}
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\frac{19L_{0}}{20}
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\left(\frac{15}{20}+\frac{4}{20}\right)L_{0}
Least common multiple of 4 and 5 is 20. Convert \frac{3}{4} and \frac{1}{5} to fractions with denominator 20.
\frac{15+4}{20}L_{0}
Since \frac{15}{20} and \frac{4}{20} have the same denominator, add them by adding their numerators.
\frac{19}{20}L_{0}
Add 15 and 4 to get 19.
\left(\frac{15}{20}+\frac{4}{20}\right)L_{0}
Least common multiple of 4 and 5 is 20. Convert \frac{3}{4} and \frac{1}{5} to fractions with denominator 20.
\frac{15+4}{20}L_{0}
Since \frac{15}{20} and \frac{4}{20} have the same denominator, add them by adding their numerators.
\frac{19}{20}L_{0}
Add 15 and 4 to get 19.
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