# SSAT Upper Level Math : Rational Numbers

## Example Questions

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### Example Question #431 : Rational Numbers

Find the sum of .  Express the final answer as a fraction.

Explanation:

Convert the  into fraction form by dividing this by .

First find the common denominator by multiplying the current denominators together.

Now convert each fraction into an equivalent fraction with the new, common denominator.

### Example Question #432 : Rational Numbers

What percentage of  is ? Round to the nearest hundredth.

Explanation:

Set up a mathematical equation such that the percentage of the number is divided by 100. Solve for the unknown value.

### Example Question #433 : Rational Numbers

Each of a set of balls is marked with a letter of the English alphabet. Each vowel is represented by five balls; each consonant, three. What percent of the balls are marked with vowels? (Nearest whole percent)

Note: For purposes of this problem, "Y" is considered a consonant.

Explanation:

There are five vowels, each represented by five balls; this is a total of

balls with vowels.

There are twenty-one consonants, each represented by three balls; this is a total of

balls with consonants.

There are  balls total of which 25 out of 88 are marked with vowels. This represents

of the balls, so 28% is the correct choice.

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