Question
PSLE
There are 30 shortbreads in a box. 21 of them are butterscotch shortbreads while the rest are plain ones. What is the ratio of the number of plain shortbreads to that of butterscotch shortbreads in the box?
1 m

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PSLE
There are 30 shortbreads in a box. 21 of them are butterscotch shortbreads while the rest are plain ones. What is the ratio of the number of plain shortbreads to that of butterscotch shortbreads in the box?