Fractions, SM-Bank 040

Three friends are baking cupcakes for the Spring Fair.

Maryanne will bake `1/4` of the cupcakes, Martin has a large oven and will bake `2/3` of the cupcakes and Monty will bake the rest.

What fraction of the cupcake baking does Monty complete? (2 marks)

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`1/12`

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`text(Monty’s Baking)`

`= 1-(1/4 + 2/3)\ \ text(LCD)\= 12`

`= (1xx12)/(1 xx 12)-((1xx3)/(4 xx 3) + (2 xx 4)/(3 xx 4))`

`= 12/12-(3/12 + 8/12)`

`= 12/12-11/12 = 1/12`

`:.\ text(Monty bakes)\ 1/12\ text(of the cupcakes)`