To paint a sunset, you make a shade of orange paint using 55 drops of red paint for every 88 drops of yellow paint. If you use 1515 drops of red paint, how many drops of yellow paint would you need?

Since the ratio of red drops to yellow drops is 55:88 and you have 1515 red drops, the yellow drops needed is given as

If 55=1515

88=?

88/55*1515=2424

therefore 2424 drops of yellow will be needed to make a shade of orange