What is the formula to find the original cost of an item given the sales tax amount and the sales tax rate?
PerFracProb #2

Flashcard
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Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Original Cost = Tax Amount / (Sales Tax Rate) = Tax Amount / (Tax Rate as a Decimal)
2.
FLASHCARD QUESTION
Front
If a student spells 12 out of 15 words correctly, how do you calculate the percentage of correct answers?
Back
Percentage = (Number of Correct Answers / Total Number of Questions) * 100
3.
FLASHCARD QUESTION
Front
What is the formula to calculate the amount of a raise given a percentage increase and the current salary?
Back
Raise Amount = Current Salary * (Raise Percentage as a Decimal) = Current Salary * (Raise Percentage / 100)
4.
FLASHCARD QUESTION
Front
How do you add fractions with different denominators?
Back
Find a common denominator, convert the fractions, then add the numerators.
5.
FLASHCARD QUESTION
Front
What is the probability of an event?
Back
Probability = (Number of Favorable Outcomes) / (Total Number of Possible Outcomes)
6.
FLASHCARD QUESTION
Front
How do you convert a percentage to a decimal?
Back
Divide the percentage by 100.
7.
FLASHCARD QUESTION
Front
What is the process to find the sum of fractions?
Back
1. Find a common denominator. 2. Convert each fraction. 3. Add the numerators.
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