Answer:
3 : 1
Explanation:
We want to work out the ratio of online sales to shop sales when a jewellery shop sells 240 necklaces in a month. 180 of the necklaces were sold via the shop's website, the rest were sold in a high street shop.
We know that they sold 180 necklaces online and we need to work out the amount sold in the shops. It says that "the rest were sold in a high street shop" so that means 240 - 180 = 60. 60 were sold in a shop
Therefore,
online sales : shop sales
180 : 60
3 : 1