If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

## Class 8 (Foundation)

### Course: Class 8 (Foundation)>Unit 6

Lesson 1: Ratio and proportion

# Solving ratio problems with tables

Equivalent ratios have the same relationship between their numerators and denominators. To find missing values in tables, maintain the same ratio. Comparing fractions is easier with common numerators or denominators. Constant speed is represented by a constant ratio between distance and time. Created by Sal Khan.

## Want to join the conversation?

• Could a triple number line work if you needed 3 lines !?.
• Most of number line need 2 lines, but there are some number lines have even 10+ lines.
• I still don’t really get this. Like, these problems he’s showing are easier compared to the ones I’m assigned to. :/
• I agree but maybe if we take notes, it will be easier. I'm not really sure. 😎😎😎😎😎😎
• So we are adding or dividing?
• I think its dividing
• Hey guys! I just joined Khan Academy a week ago! Any tips? Please let me know what you rate Khan Academy out of 10! Thanks! You guys are awesome!
• I think I would rate this 9/10 because its very helpful. I think the people who say its bad hates school, or are forced to do it over the summer.
Hope this was helpful. Have a good day! :)
• do you have any bloopers for us?
• What if you have 54:3 and you need 36: ? What if you have ?:5?
• The ratio 54:3 shows us that the simplified form is 18:1. This is because 54/3 = 18. Let's just call the blank part x. To find 36: x, you have to divide 36 by 18 to get 2 (so the ratio is 36:2). To find x:5, you have to multiply 18*5, which is 90 (the ratio is 90:5)
Hope this helps! :)
• The simple trick that I learned was that find the simplest form of the ratio and then answer the questions.
• Here is a problem:

The ratio of the distance Sam walked on Monday to the distance he walked on Tuesday is 7:5. How many times the distance that he walked on Tuesday is the distance he walked on Monday?

I don't understand the problem and why this is the answer?