Math 8 and 9 Unit 1: Integers TEST Coming soon!
ratios can be fractions or written sideways with a colon between them
3:2Â
Ratios can help us "scale up" or "scale down" stuff
Examples:
When you make juice, use 1 can of frozen juice concentrate and 3 cans of water!
the ratio of juice to water is 1:3
the ratio of water to juice is 3:1
Let's say you have 4 cans of juice concentrate and want to make it as one big jug...how much water do you add?
if the ratio of water to juice is 3:1 we want an equivalent amount so it tastes the same...but use 4 cans of juice...
3:1 is the same as x : 4
write is as a fraction...
cross multiply...
simplify...
ANSWER: 12 cans of water will make the 4 cans of juice taste just right!
Here is a digital copy of some practice worksheets! Paper copies to come in class!