Sargent Park 8-17 Math

Sunday, January 22, 2006

My Quiz Blog by ANON

1. To successfully do percent problems you need to know the following:

1. What is the question.
2. Answer the question using a simple sentence answer (using a blank for an answer)
3. What is the part and the whole? Create a word ratio.
4. Set up a proportion that looks like this part/whole = %/100%
5. The last step is to ask myself does my answer look right? If it does I can use the cross products to check if my answer is correct!

Correct Question
On an aritmetic test John received a grade of 80% He solved 24 problems correctly. How many questions were there on test?

John's test was out of __________.

On an aritmetic test John received a grade of 80% (The percent) He solved 24 problems correctly(The part because it is not the complete test!!). How many questions were there on test?

The word ratio is
questions correct/total questions
24/? = 80%/100 b therefore 24 x 100/80 = 30
There are 30 questions on the test. (30 x 80 = 24 x 100)



A question I got wrong was
The original price of the sofa was $500 It is now on sale for $440. What was the percent decrease?

The percent decrease was _______.

The original price of the sofa was $500(The whole) It is now on sale for $440(The Part). What was the percent decrease (The UNKOWN)?

sale price/origional price = percent of sale $ /100% 440/500 =88%/100%

My Mistake was to say the 88% was the percent decrease. I needed to subtract the 88 from 100 to get a difference of 12%. There fore the percent decrease between the sale and origional price is 12%.

This is an example of what your post can look like. Please restrict your use of colour to one and its use is to show important ideas inside your post.

Work hard and make this post work. Comment on other peoples work. If they are confused and cannot answer their question show them how. We all must work as a community.

Post away.

Anon or Mr. H




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