percentage problem

1)Mary pays 40% of her monthly salary for her flat by monthly in stalments. 35% of the remaining part of her salary is used to cover all other expenses and the amount left is then put into her saving account. If Mary puts $9360 into her saving account every month, find her monthly salary.

2)The monthly salary of a man is $ 12 000. He spends 37.5% of his salary on rent and 45% on other uses. The rest of his salary is saved up in the bank.
a)How much does he saved each month?
b)If there are no changes on his salary and the rent but he wants to spend $700 more on other uses, find the percentage decrese in his savings.

3)The cost price of a pair of shoes in a shop is $500. It is marked at a price so that the profit percent is 30%.
a)Find the marked price.
b)The marked price is then increase so that if the shoes are sold at a 20% discount, the profit percent is still 30%. Find the percentage increase in the marked price.






















(anwser)
1)$24000
2a)$2100
2b)33.3%
3a)$650
3b)25%

YES!

1)A merchant sell a TV at loss of $250,a washing machine at a gain of $325 AND a refrigerator at a loss OF $430.Find his total gain or loss.

2)If a car was bought at $25 000 and sold at a 30%profit,find its selling price.

3)A housewife bought a cupboard for$1600 at a discount of 20% in a shop.

(A)Find the marked price of the cupboard.
(B)If the shopkeeper sold the cupboard at its marked price ,he would have made a profit of 25%,find the cost price of the cupboard.

4)Atrader gains $310 when he sells a cupboard at a profit of 15.5%.At what price has he bought the cupboard?

DO YOU NEED THE ANSWER?

2006-12-05 18:11:03 補充：
*****is shop keeper

There is a game which has 2 servers to run the game.

If server1 now has 2355 players on-line and server2 has 2820. 15 minutes later 20% of the players on server1 had log-outted but 145 more players had logged-in into server2. What is the total number of players now playing in the two servers?

Answer:
2355 - 2355 x 0.2 + 2820 + 145
=2355 - 471 + 2965
=4849