Percents and circle graphs

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents how many parts out of 100 are considered.

Front

How do you calculate the percentage of a number?

Back

To calculate the percentage of a number, multiply the number by the percentage (in decimal form) and then divide by 100.

Front

What is a circle graph (pie chart)?

Back

A circle graph, or pie chart, is a circular statistical graphic divided into slices to illustrate numerical proportions.

Front

How do you find the angle for a sector in a circle graph?

Back

To find the angle for a sector, multiply the percentage of the category by 360 degrees.

Front

If 48 students were surveyed and 14 chose soccer, what percent chose soccer?

Back

(14/48) * 100 = 29.17%, approximately 29%.

Front

What is the formula to find the percentage decrease?

Back

Percentage decrease = [(Original Price - New Price) / Original Price] * 100.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100.

Front

What is the total angle in a circle?

Back

The total angle in a circle is 360 degrees.

Front

If 44% of students chose pizza, what is the angle for pizza in a circle graph?

Back

44% of 360 degrees = 158.4 degrees, rounded to 158 degrees.

Front

What does it mean if a circle graph is divided into equal parts?

Back

If a circle graph is divided into equal parts, it means each category represents the same percentage of the total.