Computation

Front

What is a common denominator?

Back

A common denominator is a number that can be used as a denominator for two or more fractions, allowing them to be compared or added together.

Front

What is the common denominator for 3/10 and 1/5?

Back

10

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 250% of 280, calculate 280 * 2.5.

Front

What percentage of 280 is 700?

Back

250%.

Front

What are the three ways to write a ratio?

Back

Fraction, colon, and the word 'to'.

Front

If a lady sells a sofa for $1350 and makes a 25% profit, how do you find the original price?

Back

Let the original price be x. The selling price is x + 0.25x = 1.25x. Set 1.25x = 1350 and solve for x.

Front

What is the original price of the sofa if sold for $1350 with a 25% profit?

Back

$1080.

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place that over the original denominator.

Front

How many 2/5 ounce servings are in 2 1/4 ounces?

Back

5 5/8 servings.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another.