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Hi!! Please help me with this question ASAP

A tea stall owner bought 5 litres of milk. He used 2/5 of the milk by noon. What fraction of the total milk is left??

$Quantityofmilkbought=5l\phantom{\rule{0ex}{0ex}}Quantityofmilkutilisedbynoon=\frac{2}{5}\times 5=2l\phantom{\rule{0ex}{0ex}}Quantityofmilkleft=Quantityofmilkbought-Quantityofmilkutilisedbynoon\phantom{\rule{0ex}{0ex}}=5-2\phantom{\rule{0ex}{0ex}}=3l\phantom{\rule{0ex}{0ex}}Fractionoftotalmilkleft=\frac{Quantityofmilkleft}{Quantityofmilkbought}=\frac{3}{5}$

Regards

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