Marla Mae's Percent Post

~Welcome to my percent post~

Part 1. Describe how to find percents

• 50% -To find 50% of a number, what you have to do is take your number and divide it by 2.

• 10% - To find 10% of a number, what you have to do is take your number and divide it by 10.

• 1% - To find 1% of a number, what you have to do is take you number and divide it by 100.

• 25% - To find 25% of a number, what you have to do is take you number and divide it by 4.

• Definition of a percent - a word is a number out of a hundred. Percent it also another word for "hundredths".

Part 2. Representing Percents.

• 180%

• 12 3/4 %

• 0.7%

Part 3. Converting Decimals to Percents to Fractions.

• 26% 

Decimal - To convert a percent to a decimal, what you do is take your whole and divide it by 100.
26÷100=0.26

Fraction - To convert a percent into a fraction, what you do is take your whole number and turn it into a decimal and then look at the last digit and use that last digits place for your denominator.
26÷100=0.26
0.26 in this case the 6 is the last digit, it's in the hundredths place. So it would be 26/100)

• 7/10

Percent - To convert a fraction into a percent, what you do is take the numerator and divide it by the denominator. Then you take your decimal number and multiply it by 100. (Example 7/10, 7÷10=0.7 0.7 x 100 = 70)

Decimal - To convert a fraction to a decimal, what you do is take the numerator and divide it by the denominator and you should get a decimal for your answer. (Example, 7÷10=0.7)

• 0.024

Fraction - To convert a decimal to a fraction, what you do is look at the last number of the decimal and see what place value the last digit is. Which is 4, it's in the thousandths place value. 
0.024 thousands place, 24/1000.

Percent - To convert a decimal to a percent, what you do is multiply your number by 100.
0.024 x 100 = 2.4

Part 4.  Percent of a number is the next part of this exercise. Mental Math. How to find a percent of a number.

• 20% of 60

20% of 60
10% = 6
10% = 6
6+6=12  
20% of 60 is 12.

• 0.1% of 40

0.1% of 40
If you know that you're trying to find 1% of a number you divide it by 100. So since you're trying 0.1% of 40 you take 40 and divide it by a 1000.
40÷1000
=0.04 

• 250% of 400

100% is 400 so if you double it you get 200 and also figure out 50% you then add those two together 200 + 50 = 250 and you have your 250%. 
400÷100
= 4 x 250
= 1000

Part 5. Combining Percents.

Discount - The discount is how much you take away from your original price. The discount is also how much money you save.

Sale Price - The sale price is a new price on one item. So the original price has changed to a lower price, which is also the sale price. For example the original price was $50 and now it's $35.

Total Prices with Taxes - The total prices are what you pay for after you have calculated how much you need to pay, then the taxes are the percentages that you have to pay for additional money, which usually depends on where you live. After you add the total prices and taxes together, that's how much you need to pay.

Textbook Question - 
What is the sale price at each store? Which is a better buy?
Explain your thinking.
Store A: $350.99 is the original price and is 50% off one day only.
Store B: $375.00 is the original price and is 25% off one day followed by 25% off the reduced price the second day.

Store A -
One Day,
350.99÷2=175.50
Sale Price at store A is $175.50

Store B -
Day One,
375÷100
=3.75 x 25 
=93.75 
$375 - $93.75
= $281.25

Day Two,
281.25÷100
=2.81 x 25 
=70.25
$281.25 - $70.25
=$211

I think that Store A is a better buy because you would save more money than you would if you went to Store B. At Store A you would be saving $35.50.

A better deal would be taking 50% of the original price because you're mostly just taking the original price and just dividing it in half. I think 50% is better because if you used the 25% and then used the reduced price and took off another 25%, I think you'd be just making your sale price little by little.

That is my Percent Post.