373 Answered Questions for the topic Percentages

05/16/20

#### The scores on a test are normally distributed with a mean of 80 and a standard deviation of 5. Twelve students had test scores between 80 and 90. Estimate the number of students who took the test.

The score range is between 0 to 100.

#### How to change mixture for a solution with a given ratio?

I have a mixture with 70% of one composite element and 30% of another composite element. I want to change the mixture to 50%/50% and the total weight to be 1kg or 1,000g.How much of the 30%...
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10/23/19

#### An international company has 21,400 employees in one country. If this represents 23.7% of the country, how many employees does it have in total?

ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER

09/27/19

#### Help me settle an argument

If I loan my friend 26 cents and he uses that 26 cents to buy a 10,000 yacht, how much of that yacht will I own?

#### Rock age by finding using elements and percentages

Certain element has a half life of 2.5 billion years..15% of the original element remains. The other 85% decayed into lead. How old is the rock? Analysis of another rock shows that it contains 65%...
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07/13/19

#### How to determine interest and payment sizes?

Jennifer borrowed $3000 from the bank in order to buy a new jacuzzi. She will pay it off by equal payments at the end of each week for 4 years. The annual interest rate is 8.05%. Determine the...
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#### Any reason to use division while finding a percentage?

6960.66 + 4% = 7,239.09I was told this is wrong and I should have done the math like this:6960.66 divided by .96 = 7250.68Why is this? Is the person who is telling me this wrong? I've never...
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Percentages Prealgebra

05/26/19

#### Word problem on money, percentages and tax

Hi can you help me solve this question? It goes like this I think I'm not fully sure thoughA man imports models from china it costs him $5.95 per model, he also has to pay 5% tax per import. He...
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Percentages Elementary Math

05/24/19

#### Working out different day rates?

If I have a pot of money worth £110,000 how do I work out the exact cost of:7 full day rates28 days charged at 50% of a full day rate 12 days charged at 25% of a full day rate

Percentages Math

05/14/19

#### A skateboard costs $45, there is a 15% discount and a 7% sales tax. What is the new price of the skateboard?

05/13/19

#### Percentages question that I am stuck on

One day at a school 70% of the students wore a polo shirt. 80% of the students wearing polo shirts were boys.What percentage of the students were boys who wore polo shirts?

Percentages Prealgebra

04/04/19

#### A couch was bought at a wholesale price of $113.00 and Jessica's Furniture Store marks up all furniture by 45%, percent.At what price should the manager sell the couch?

Percentages Algebra 1

04/03/19

#### Percentages/Conversion

A video merchant sold 24 cases of tapes, which was 20% of what he had left. What percent of tapes did he sell?

#### PSAT question ( help please)

last week benjamin spent $82.80 on groceries and $132.48 on bills. The amount he spent on groceries was %15 of his paycheck , What percent of his paycheck did benjamin spend on bills?I need to know...
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Percentages Chemistry

04/01/19

#### An alloy of brass is composed of 84.6% copper, 5.20% tin, 6.70% lead, and zinc. The number of pounds of zinc required to make 520.0 pounds of alloy is "_____"

Obviously this is a homework question for my trade school. What I don't get about this is the wording. The zinc equals 3.5% of an alloy from what I put together. I don't understand though. Do these...
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#### Percentage evaulation Queestion from GRE?

A question from GRE book says: A candidate who gets 30 percent marks in an examination fails by 30 marks,but another candidate who gets 42 percent marks get 42 more marks than necessary for...
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Percentages

03/11/19

#### I need to work deduct 7.5% from a figure and then 19% of the resulting figure, is there one calculation I can do to get the final answer?

03/04/19

#### Help me work out my grade

For one of my university essays, I scored 57/100. That essay was worth 30%.After that, I did an exam that was also out of 100 and made up the remaining 70% of my overall grade.However, I did not...
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Percentages Prealgebra

02/25/19

#### If I have a 86.96 percent on class .I fail the midterm worth 15% of my grade how far will it bring my grade down.?

Percentages Prealgebra

02/19/19

#### The price of an item was $180. Today the price rose to $261. What’s the percentage increase

The price of an item was $180. Today the price rose to $261. What’s the percentage increase

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