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Lesson 2: Visualize equivalent ratios

# Ratios with tape diagrams (part:whole)

Find the ratio of open-ended to multiple-choice questions. If the ratio is 5:4, it means for every 5 open-ended questions, there are 4 multiple-choice questions. The video then shows how to use this ratio to complete a table with missing values for multiple-choice and total questions.Read a part-to-whole ratio from a tape diagram showing the ratio of the two parts. Then scale up to generate sets of values that the diagram might represent. Created by Sal Khan.

## Want to join the conversation?

• there are subtitles on most videos, just click the CC at the bottom for "closed captions". is it not on this one?
• I don't get how you get the answer? Great video btw but I mostly don't understand quite a bit of it.
• You get the answer by figuring out what can be multplied by the numbers in the ratios to get your new ratio.
• I kinda get it but also dont get it.. HELP AHHHH :(
• so it's like this, you have the smaller numbers, 5 and 4. 5 and 4 are just the ratios. Add 5 and 4 together to get 9(The total amount of questions ratio). Then, for the first answer you can see that 4 is multiplied by 2 to get 8. So then you can just take 9 and multiply it by 2. You get 18! Yay! only 1 more question left! Now you have 45 as your hint. If you divide, that's really just 9 times 5. Now that you know that, you can use the 5 and multiply it with 4. Now you have 20! And you are also done!

Hope this helped :D
• Can someone do an example cause i'm so confused right now
• u could use the same example teacher Sam said.
u also could use ratios in ur question like the upvotes & downvotes:
1:1 or 1 to 1
• Are ratios important except for science
• They are always important
• Does anybody have any other purposes for ratios in real life except for cooking?
• Science... For figuring out percentages...
remember ratios are just another form of fractions...
• how do I multiply,divide,subtract and add whole by fractions. for example: 22 x 3/4
21+ 2/9
36- 20/34
And so so forth
And how do I add ratios
• I get normal ratios just not the tape ones?!