A jewellery shops sell 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. Work out the ratio of online sales to shop sales. Give your answer in it's simplest form.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.