How to find a discount percent

A medical clerk noticed that 7635 patients were admitted to the hospital in a one-year period. 4/15 of them had heart or lung diseases. How many patients with heart or lung diseases were admitted to the hospital during the year?

A dog's weight increased by 50% in 3 years. By the end of 3 years, the dog weighed 45 pounds. How much did the dog weigh 3 years ago?

Flying with the wind a plane went 386 km/h. Flying into the same wind the plane only went 318 km/h. find the speed of the plane in still air and the speed of the wind.

Which of the following expressions is equivalent to the one shown below (-3) ^2 * (-3) ^9 A. (-3) ^11 B. (-3) ^7 C. (-3) ^10 D. (-3) ^18

Lance says that 2,376:10 to the power of two is the same as 2,376*0.1 is he correct? why or why not?

The Lewis family went out to an expensive restaurant for dinner. The bill was $108.00. Mr. Lewis wanted to leave a 15% tip. How much did he pay in all, including the tip?

Joey wants to build a rectangular garden. He plans to use a side of a river for one side of the garden, he will not place fencing along this side of the garden. He has 92 yards of fencing material. What is the maximum area that will be enclosed?

Mason used 6 quarts of milk to make chocolate ice cream and 4 pints of milk to make peach ice cream. How many cups of milk did mason use?

Jaime is at a library that is 5 miles from her house. Her brother, Max, is at a rec center that is 4.5 miles from the house. The library and rec center both close at 6:00 p. m.

The perimeter of a rectangular swimming pool is 446 centimeters. The width of the pool is 7 centimeters less than the length of the pool. Find the length and the width of the swimming pool.