Percent to ...
Change a percent to a fraction: 50%
What is 1/2?
Change to a percent: 0.75
What is 75%?
Find the percent change.
Original cost: $100
New cost: $59
(100-59)/100 = 41/100 = .41= 41%
41% decrease
The price of gasoline rose from $3.50 to $3.71 in one week. By what percent did the gas price increase?
6% increase
Change a percent to a decimal: 10%
What is 0.10?
Change to a percent: 12/100
What is 12%?
Find the cost of the tickets after sales tax.
tickets: $52.50
sales tax: 7%
52.5 * 7% = 52.5 * .07 =
52.50 + 3.68 = $56.18
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 decrease of the value of the car?
(8500-9559)/8500 = -1059/8500 = -.12
12% decrease
Write the percent as a decimal: 125%
What is 1.25?
Change to a percent: 0.325
What is 32.5%?
Find the cost of the jeans after the discount.
jeans: $39.99 sales
discount: 15%
39.99 * 15% = 39.99 * .15 = 6.00
39.99 - 6.00 = $33.99
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?
3,000,000 *1.5 = 4,500,000 users
Write the percent as a decimal: 6%
What is 0.06?
Change to a percent: 2/5
What is 40%?
What is the cost of the skates after the discount and tax are applied?
skates: $99.99
discount: 20%
sales tax: 6.75%
99.99 * 20% = 99.99 *.80 = 20.00=
99.99 - 20.00 = 79.99 * 6.75% =
79.99 * .0675 = 5.40
79.99 + 5.40 = 85.39
Music Systems, Inc. allows a 10% discount if a purchase is paid for within 30 days. An additional 5% discount is given if the purchase is paid for within 15 days. Brent Goodson buys a sound system that originally cost $360. If he pays the entire amount at the time of purchase, how much does he pay for his system after the successive discounts?
360* 10% = 360 * .1 = 360 *.1 = 36.00
360 - 36 = 324 * .5 = 324 * .05 = 16.20
324 - 16.20 = 307.80
Write the percent as a decimal: 503%
What is 5.03?
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 *5% = 19.95 *.05 = 1.00
19.95 - 1.00 = 18.95
18.95 * 5%= .95
18.95 + .95 = 19.90
$19.90
Percent change of 16 to 72
350% increase