IXL | Create percent bar graphs

Jill went to an open-mic night at the teen center in her town. She counted the number of acts so she could write about the event for her school newspaper.

Open-mic night
Type of act	Music	Comedy	Poetry
Frequency	5	3	2

Make a percent bar graph that shows the relative frequencies of each type of act.

Music

Comedy

Poetry

Type of act

Relative frequency (%)

Open-mic night

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Learn with an example

question

This morning, Sprinkles Donut Shop sold 15 chocolate donuts, 10 glazed donuts, 5 jelly donuts, and 20 maple donuts.

Make a percent bar graph that shows the relative frequencies of the donut types.

Chocolate

Glazed

Jelly

Maple

Type

Relative frequency (%)

Donut sales

key idea

The relative frequency of a category is the ratio of the number in that category to the total number.

Relative frequency

number in a category

total number

Relative frequencies are often written as percents.

solution

To make the percent bar graph, you need to know the relative frequency of each donut type. Start by finding the total number of donuts Sprinkles Donut Shop sold.

The shop sold a total of 50 donuts. Write the relative frequency of each donut type as a fraction with a denominator of 50.

Donut sales
Type	Chocolate	Glazed	Jelly	Maple
Frequency	15	10	5	20
Relative frequency	15 50	10 50	5 50	20 50

Now write each relative frequency as a percent. Start with the relative frequency of chocolate donuts,

Since a percent tells you a part out of 100, write an equivalent fraction with a denominator of 100.

100

The relative frequency of chocolate donuts is 30%. You can write the other relative frequencies as percents the same way.

Donut sales
Type	Chocolate	Glazed	Jelly	Maple
Frequency	15	10	5	20
Relative frequency	30%	20%	10%	40%

Now use the relative frequencies to make a percent bar graph. Set the height of each bar to its relative frequency written as a percent. For example, the bar for chocolate donuts should have a height of 30%.

Chocolate

Glazed

Jelly

Maple

Type

Relative frequency (%)

Donut sales

Looking for more? Try these:

Lesson: Percents

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Teacher tools

Work it out

Not feeling ready yet? These can help:

II.6Create relative frequency tables

II.7Create bar graphs

II.5Interpret categorical data

Lesson: Percents

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