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At first, water accounts for $$\frac{2}{5}$$ of a barrel. Later, 40 gallons of water is removed from the barrel, then the water left only accounts for $$\frac{2}{11}$$ of the barrel. Therefore, how many gallons of water is still needed to fill the barrel?
70% of the employees in a company is lawyer, and 55% of the employees are female. 60% of all the females are lawyer. what is the ratio of male lawyer to all the employees in the company?

Give your answer as a percent.
If a is 45% greater than b, then b is smaller than a by what percentage?

Give your answer to the nearest hundredth digit.

_____%
z=$$x^{2}$$y, if x decreases by 40%, and y increases by 50%. By what percent will z decrease?
x increases by 10% each year. After increasing by 2 years, the result is 4356, what is the value of x?
The stock price of a certain stock is $6,000 on May $$5^{th}$$. Compared with May $$4^{th}$$, the stock price drops by 8%. The stock price is the same on May$$6^{th}$$ and May $$4^{th}$$. If so, by what percent does the stock price increase from May $$5^{th}$$ to May $$6^{th}$$?

Give your answer to the nearest tenth.
The interior dimensions of a rectangular tank has a length of 110 centimeters, width of 90 centimeters, and height of 270 centimeters. The tank rests on level ground. Based on the assumption that the volume of water increases by 10 percent when it freezes, which of the following is closest to the maximum height, in centimeters, to which the tank can be filled with water so that when the water freezes, the ice would not rise above the top of the tank?
If the price of a product first increased by 30% and then decreased by 30%, then the new price is decreased (or increased) by what percent than the original price? _____%
Ashim purchases some goods whose listed price is $200 in Wal-Mart.

Quantity A

The price after discounted 15% and then $20 off

Quantity B

The price after $20 off and then discounted 15%


Currently, the sales of a store is 10,000. If its sales increases by 20% every year than the previous year, then within how many years will its sales reach between 20,000 and 25,000?

Indicate all that is/are true.
A product`s price is originally p. In the first year, its price increases by 15%. In the second year, its price continues to increase by 15% than the first year. What percent is the price in the second year higher than the original price?
For a certain foreign currency, 1 dollar could exchange 0.8 euro. If so, how many dollars of the currency can exchange 2 euro?
A needs T hours to finish a work, and B needs 3T hours to finish the work. How many hours are needed if they work together?
The overall volume of a water tank is g. If the inlet valve is open for a minute, x volume of water will be added to the tank; If the discharge valve is open for a minute, y volume of water will be removed from the tank (y>x). If the tank is filled with water at first, then in how many minutes will the water volume in the tank drop to a half if the inlet valve and discharge valve are both open?

Give your answer with x, y and g.
A printer can print 10 to 15 pages for every minute. Person A printed for 3 minutes and 12 seconds with the printer, while Person B printed for 4 minutes and 48 seconds with the printer. Which of the following statements must be true?

Indicate all such statements.
The speed of Tom`s car is 60 miles per hour from home to work, and 40 miles per hour from work to home. If the total hours he spent on road is 2.5 hours, how many miles are there from his home to work?
$$\frac{x}{y}$$ - $$\frac{w}{u}$$ =2

Car A travels x miles within y hours, while car B travels w miles within u hours.

Quantity A

The average speed of car A

Quantity B

The average speed of car B


A and B are 500 miles away. A car starts off from A at a speed of 80 miles per hour; an hour later, another car starts off from B at a speed of 70 miles per hour. By the time they meet, how far has the first car travelled?

The triangle is inscribed in the semi-circle. If AB=12, BC=10, what is the area of the shaded area?
20 liters of Solution A is 12% salt. How many liters of Solution B that is 20% salt have to be added to Solution A such that the mixed solution will become 15%?

_____liters

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