# SAT Math : Fractions and Percentage

## Example Questions

### Example Question #11 : Fractions

Solve each problem and decide which is the best of the choices given.

There is a bag with  green marbles,  red marbles,  purple marbles, and  blue marbles. What is the probability that a red marble is randomly chosen from the bag?

Explanation:

To find the probability of a red marble being randomly chosen, you have to divide the number of red marbles by the total number of marbles.

There are  red, and  total,

thus, creating the fraction

.

To find the percentage, simply divide  by  and multiply the result by  to get .

### Example Question #11 : Fractions

Determine the approximate percentage given the fraction .

Explanation:

Because a fraction is a part of a whole , set up a proportion.

The fraction  is approximately .

### Example Question #1 : Fractions And Percentage

Bob and Jill go eat dinner at a fancy restaurant. Bob gets lobster and Jill gets crab legs. The lobster cost , and the crab legs cost . If they leave  tip, how much is the combined bill?