Answer :

naǫ
[tex]\frac{7}{10}-\frac{1}{15}=\frac{7 \times 3}{10 \times 3}-\frac{1 \times 2}{15 \times 2}=\frac{21}{30}-\frac{2}{30}=\frac{21-2}{30}=\frac{19}{30}[/tex]

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