Tuesday, December 10, 2013

Patrick's percent post

Welcome to my percent post!

Part 1.
Describe how you would find 50%
We divide the number by 2

Describe how you would find 10%
We divide the number by 10

Describe how you find 1%
We divide the number by 100

Describe how you would find 25%
We divide the number by 4

Percent: It is a number that is out of 100

Part 2.


This is how you represent 180%












This is how you represent 12 3/4%













This is how you represent 0.7%











Part 3. 


1) 26%- Percents to Decimal:
Divide the percent by 100 to get the decimal
26%÷100= 0.26
Decimal to fraction:
Find out the place value of the last digit behind the decimal to find the denominator. Once it`s found you take away the decimal to find the numerator.
26/100

2) 7/10- Fraction to Decimal:
Divide the numerator by the denominator to get the decimal
0.7
Decimal to Percent:
To get the percent from the decimal we multiply the number by 100 because a percent is out of 100

3) 0.024- Decimal to Percent:
Multiply the decimal by 100 to get the percent
0.024÷100= 2.4%
Percent to Fraction:
To find the numerator we take out the decimal and that becomes our numerator. To find the denominator we find the place value of the last digit behind the decimal to get the denominator.
24/10

Part 4.
1) 20% of 60
10%-0.6 
10%-0.6
0.6+0.6=1.2
20% of 60= 1.2

2) 0.1% of 40
1%- 0.4
0.5%- 0.2
2.5%- 0.1
1.25%- 0.05
0.6%- 0.025
0.3%- 0.0125
0.1%- 0.00625
0.1% of 40= 0.00625

3) 250% of 400
100%- 400
100%- 400
50%- 200
250% of 400=1000

Part 5.
 

Show you know page 148: What is the final sale price at each store? Which is a better buy? Explain you thinking.
Store A: 50% off one day only
Store B: 25% off one day followed by 25% off the reduced price the second day

For example the price is $360.00

Store A: 50% of $360.00
Divide the price by 2 because it explains 50%
$360.00÷2= $180.00
The final price for store A is $180.00

Store B: 25% off original price
Divide the price by 4 because it explains 25%
$360.00÷4= $90.00= discounted price
Divide the discounted price by 4 to reduce it the second day
$90.00÷4= $22.50
The final price for store B is $22.50

Store B is a better buy because we save more money when we buy the item.

The better deal is when you take 25% off the original price and then taking another 25% off the discounted price because instead of taking 50% off the original price you take 25% off the discounted price.

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