What is percent error?
IM Unit 4 Assessment Review

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Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the true value. It is calculated using the formula: Percent Error = |(Estimated Value - Actual Value)| / Actual Value * 100%.
2.
FLASHCARD QUESTION
Front
How do you calculate the new population after a percentage decrease?
Back
To calculate the new population after a percentage decrease, multiply the original population by (1 - percentage decrease). For example, if the original population is 60 and it decreases by 25%, the new population is 60 * (1 - 0.25) = 60 * 0.75 = 45.
3.
FLASHCARD QUESTION
Front
What does it mean if a container holds 25% more than another?
Back
If a container holds 25% more than another, it means the new container's volume is 125% of the original container's volume. To find the new volume, multiply the original volume by 1.25.
4.
FLASHCARD QUESTION
Front
How do you find the total cost of multiple items purchased by weight?
Back
To find the total cost of multiple items purchased by weight, multiply the weight of each item by its price per pound and then sum the costs of all items.
5.
FLASHCARD QUESTION
Front
What is the formula to find the length of an object that is a certain percentage longer than another?
Back
To find the length of an object that is a certain percentage longer, use the formula: New Length = Original Length * (1 + Percentage Increase). For example, if a truck is 75% longer than a car that is 180 inches long, the truck's length is 180 * (1 + 0.75) = 315 inches.
6.
FLASHCARD QUESTION
Front
What is a percentage?
Back
A percentage is a way of expressing a number as a fraction of 100. It is often used to compare relative sizes or amounts.
7.
FLASHCARD QUESTION
Front
How do you convert a fraction to a percentage?
Back
To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.
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