Circle Graphs and Percents

Front

What is a circle graph (pie chart)?

Back

A circle graph, or pie chart, is a circular statistical graphic that is divided into slices to illustrate numerical proportions. Each slice represents a category's contribution to the total.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 30% becomes 0.30.

Front

What is the formula to find a percentage of a number?

Back

The formula to find a percentage of a number is: (Percentage / 100) * Total Number.

Front

If 30% of a number is 75, what is the number?

Back

To find the number, use the formula: Number = (75 * 100) / 30, which equals 250.

Front

How do you find the total number of people surveyed if you know the percentage that liked a certain topping?

Back

To find the total number surveyed, divide the number of people who liked the topping by the percentage (in decimal form) that represents them.

Front

What is the relationship between fractions, decimals, and percentages?

Back

Fractions, decimals, and percentages are different ways to represent the same value. For example, 1/2 is equivalent to 0.5 and 50%.

Front

How do you calculate the number of students who prefer a certain option based on a total?

Back

To calculate the number of students who prefer a certain option, multiply the total number of students by the percentage (in decimal form) that prefer that option.

Front

What is the significance of the total in a circle graph?

Back

The total in a circle graph represents 100% of the data being analyzed, and each slice's size is proportional to its percentage of the total.

Front

How can you determine the number of items in a category from a total?

Back

To determine the number of items in a category, multiply the total number of items by the percentage of that category (expressed as a decimal).

Front

What does it mean if a circle graph has a slice that represents 25%?

Back

If a slice represents 25%, it means that the category accounts for one-quarter of the total data represented in the graph.