Percent to Fraction
Change from a percent to a fraction: 50%
What is 1/2?
Change to a percent: 0.75
What is 75%?
Find the percent change and say whether it is an increase or a decrease.
Original cost: $100
New cost: $59
(59-100)/100 = -41/100 = -.41= -41%
What is 41% decrease?
The price of gasoline rose from $3.50 to $3.71 in one week. By what percent did the gas price change? Make sure to indicate whether this is an increase or a decrease.
(3.71-3.50)/3.50 = .21/3.50= .06
What is a 6% increase
Change from a percent to a fraction: 10%
What is
1/10 ?
Change to a percent: 12/100
What is 12%?
Find the cost of the tickets after sales tax.
tickets: $52.50
sales tax: 7%
54.5 * 107% = 54.5 *1.07 = $58.32
What is $58.32?
As soon as a new car is purchased and driven away from the dealership, it begins to lose its value, or depreciate. Alonso bought a 1994 Plymouth Neon for $9559. One year later, the value of the car was $8500. What was the percent of change of the value of the car? Make sure to indicate whether this is an increase or a decrease. Round to the nearest whole percent.
(8500-9559)/9559 = -1059/9559 = -.11
What is 11% decrease?
Write the percent as a mixed number: 125%.
What is
1 1/(4)
?
Change to a percent: 0.325
Find the cost of the jeans after the discount.
jeans: $39.99 sales
discount: 15%
39.99 * (100%-15%) = 39.99 * 85% = 39.99 *.85 = $34
What is $34.00?
In 1995, America Online had about 3,000,000 users. Over the next decade, users are expected to increase from a few million to the tens of millions. Suppose the number of users increases by 150% by the year 2000. How many users will there be in the year 2000? Don't forget your units!
3,000,000 *1.5 = 4,500,000 users
3,000,000 + 4,500,000 = 7,500,000
What are 7,500,000 users?
Write the fraction as a percent:
2 2/(17)
Round to the nearest whole percent.
What is 212%?
Change to a percent: 2/5
What is 40%?
What is the cost of the skates after 20% discount and and 6.75% tax are applied?
skates: $99.99
99.99 * (100%-20%) = 99.99 *80% = 99.99 *.8 = 79.99
79.99 * (100% + 6.75%) = 79.99 * 106.75% = 79.99 *1.0675 = 85.39
What is $85.39?
You go to a restaurant and the bill is $57.23. You want to give a generous tip of 20% and the tax is 6.8%.
$57.23* 0.2 = $11.45 tip
$57.23 * 0.068 = $3.89
$57.23+$11.45+$3.89 = $72.57
What is $72.57
Write the fraction as a percent: -5
Round to the nearest hundredth of a percent.
What is -500.00%?
Change to a percent: 0.045
What is 4.5%?
What is the final cost of the book after the discount and tax?
book: $19.95
discount: 5%
sales tax: 5%
19.95 *(100%-5%) = 19.95 *95% = 19.95 *.95 = 18.95
18.95 * (100% + 5%)= 18.95 * 105% = 18.96 *1.05 = 19.90
What is $19.90?
You buy a pair of running shoes for $120. You receive a 10% discount because you are a member of the local running club. The sales tax is 7.5%. What do you pay?
$120 *0.9 = $108
$108 *0.075 = $8.10
$108 + $8.10 = $116.10.
What is $116.10?