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.

3:1

Step-by-step explanation:

Given data

Total 240 necklaces

180 of the necklaces were sold via the shop's website

the rest sold in a hight street shop= 240-180= 60 necklaces

Required

The ratio of online sales to shop sales

180 to 60

180:60

180/60

in the more reduced form

180/60= 3:1

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15