Work backwards.voltes5 wrote:Can anyone help?

There were 275 boxes of cookies and muffin in a bakery. Then 70% of the boxes of cookies and 60% of the boxes of muffin were sold. The ratio of the number of boxes of cookies left to the number of boxes of muffins left was 2:1.

a) How many boxes of cookies and muffins were left?

b) How many boxes of muffins were in the bakery at first?

In the end,

C : M = > 24 (30%) : 12 (40%)

In the beginning,

C : M = > 80 : 30

80u + 30u = 275

110u=275

u=2.5

a) Muffin + Cookies left = 36u = 90 boxes

b) Muffin at first = 30u = 75 boxes