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She calculate the cost with her caculator and did 20 x 1.40. The cost is $28.00. So she needs $28 to buy chips for the party

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Kristen is buying chips for a party she is having. They are going to have 20 people at the party. The cost of 1 bag of chips is $1.40. She wants to figure out the cost for all 20 people. What is the cost for the bag of chips for everyone at her party?

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It means that a fraction or ratio is simplified or reduced into a smaller fraction. It kind of means unit rate but sometimes does not have a 1 at the bottom

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The Ratio in a problem can be 5:15 or 5 to 15 and 5/15.The unit rate is 3/1.

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For everyone 1 boy/male student they have 2 girl/female students. So the unit rate for amount of boys to girls is 2/1

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Unit rate Vs Constant of Proportionately:

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Unit rate Vs Constant of Proportionately:

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A unit rate is the simplest form but it always has a 1 in the denominator.The constant of proportionately  is the simplest form but it does not always have a 1 in the denominator.

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Ratios can be written in 3 forms.The first form is in fraction form.
EX:2/4
The second form is word form.
EX:2 to 4
The third form is to write it with a colon.
EX: 2:4

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A part to whole Ratio is a Ratio that shows the relationship between 1 part of a quantity and a whole quantity that is being compared.

EX: 15 girls to 27 students

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A unit rate is a simplified version of a fraction or ratio. It always has to have a denominator of 1.
EX: 4/1 or 4:1

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A Ratio is a quantitive relationship between two amounts showing the number of times one value contains or is contained within the other.
EX: 1:2= 2:4