Percentages and Double Number Lines

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

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 25% of 200, calculate 200 x 0.25 = 50.

Front

What does 250% mean?

Back

250% means 250 out of 100, or 2.5 times the whole. For example, if something is 250% of a value, it is 2.5 times that value.

Front

How do you convert a percentage to a fraction?

Back

To convert a percentage to a fraction, place the percentage number over 100 and simplify if possible. For example, 25% = 25/100 = 1/4.

Front

What is a double number line?

Back

A double number line is a visual representation that shows two sets of numbers along parallel lines, helping to compare and understand relationships between them.

Front

If 40% of students prefer hip-hop music and there are 100 students, how many total students are there?

Back

250 students. (100 is 40% of 250.)

Front

How do you find the total amount when given a percentage?

Back

To find the total amount when given a percentage, divide the known amount by the percentage (in decimal form). For example, if 80 mg is 100%, then the total is 80 mg.

Front

What is the relationship between ounces and milligrams?

Back

1 ounce is approximately 28,349.5 milligrams. This conversion is useful for understanding measurements in different units.

Front

How do you convert feet to centimeters?

Back

To convert feet to centimeters, multiply the number of feet by 30.48 (since 1 foot = 30.48 cm). For example, 90 feet = 90 x 30.48 = 2,743.2 cm.

Front

What is the formula for finding the number of successful attempts based on percentage?

Back

The formula is: Successful Attempts = Total Attempts x (Percentage / 100). For example, for 40 attempts and 25%, it would be 40 x 0.25 = 10.