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Lesson 3: Equivalent ratios

# 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
• 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.
• there is no pattern I don't understand ;(
• I got a qestion
• Me too, what’s your question?
• can I please stop doing ratios?
• You can, but the better choice is to learn it, no matter how hard it is, because you use it in everyday life, such as when you are driving(10 miles per hour), creating a party(1 meal for 6 people) and much more.

Have a blessed and wonderful day, and never stop learning because knowledge is the key to opening doors to new opportunities :)
• Do we multiply or divide?
• 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?