What is a rate?
7.4d Rates ,Ratios, and Percents

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Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A rate is a ratio that compares two different quantities, often expressed as a quantity per unit of another quantity.
2.
FLASHCARD QUESTION
Front
What is a ratio?
Back
A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.
3.
FLASHCARD QUESTION
Front
What is a percent?
Back
A percent is a way of expressing a number as a fraction of 100, often used to compare relative sizes.
4.
FLASHCARD QUESTION
Front
How do you calculate the unit rate?
Back
To calculate the unit rate, divide the total quantity by the number of units. For example, if a store has 120 customers in 8 hours, the unit rate is 120 ÷ 8 = 15 customers per hour.
5.
FLASHCARD QUESTION
Front
What is the formula for percent of change?
Back
Percent of change = (New Value - Original Value) / Original Value × 100.
6.
FLASHCARD QUESTION
Front
If a stereo originally priced at $360 is on sale for $200, what is the percent of change?
Back
Percent of change = (200 - 360) / 360 × 100 = -44%. The price decreased by 44%.
7.
FLASHCARD QUESTION
Front
What is the unit rate in dollars per pound if you spend $40 on 5 pounds of concrete?
Back
Unit rate = Total cost / Total weight = $40 / 5 pounds = $8 per pound.
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