From a group of 1200 students 12% took a scholarship examination. Of those who took the test 25% qualified for the semifinals. How many qualified for the semifinals?
Carl saves 30% of his salary of $520. How much does he spend?
The population of a town increased by 20% from 1985 to 1990, and decreased 20% from 1990 to 1995. How did the population change from 1985 to 1995 as a percent?
Tina's weight went up from 60 to 70 pounds in a year. What was the percent of increase?
Martha buys a book at 8% discount and saves $2.40. What did she pay for the book?
The cost of a used car was $2,884. This included a sales tax of 3%. Find the cost of the car without the tax.
If 2 out of any 5 students in a class of 35 intend to go to summer school, how many intend to go to summer school?
If x + y = 6 and y + z = 9, what is the value of z?
If 45 cards can be copied in 30 minutes, how many hours will it take to copy 540 such cards at the same rate?
A student received 79, 86 and 96 on his 3 tests. What must be his fourth grade to make his average of 90?