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Question
An oil tin contains `3 3/4` litres of oil of which `2 1/2` litres of oil is used. How much oil is leftover?
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Solution
Total available oil in the tin = `3 3/4` litres
Quantity of oil used = `2 1/2` litres
Quantity of oil leftover = `3 3/4 - 2 1/2`
= `3 + 3/4 - (2 + 1/2)`
= `(3 - 2) + (3/4 - 1/2)`
= `1 + (3/4 - 2/4)`
= `1 + ((3-2)/4)`
= `1 + 1/4`
= `1 1/4`
Quantity of oil leftover = `1 1/4` litres.
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