Pls help...pls show me the steps to solve the following probs...thanks lots..

Qn1: Limin bought 2.5 metres of cloth. Each dress used

metres. If she made 3 dresses, how much cloth

was left?

Qn2: The ratio of men to women in a food court is 4:3. The ratio

of women to children is 5:2. If there are 24 children, how

many men are there?

Qn3: of Limin's money can buy 40 books. How many books

can she buy with of her money?