Kevin and Peter had been friends for
almost 6 years. Now there was friction between them. There had been some verbal exchanges, but they had not gotten physical yet. The argument was over who should get the last piece of the cake Erin made for her birthday party. When Erin made the cake, she used a ratio of two-thirds of a cup of sugar to every two and a half cups of flour. If she used seventeen and a half cups of flour, how many cups of sugar did she use?
x/(17 1/2) = (2/3) / (2 1/2)
x = (17 1/2)/(2 1/2) * 2/3 = 4 2/3