Change Percent to ...
Change to 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
(59-100)/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 rise?
(3.71-3.50)/3.50 = .21/3.50= .06
6% increase
Change to 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%
54.5 * 107% = 54.5 *1.07 = $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 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
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
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 * (100%-20%) = 99.99 *80% = 99.99 *.8 = 80
80 * (100% + 6.75%) = 80 * 106.75% = 80 *1.0675 = 85.4
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* (100%-10%) = 360 *90% = 360 *.9 =324
324 * (100%-5%) = 324 *95% = 324 *.95= 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 *(100%-5%) = 19.95 *95% = 19.95 *.95 = 18.96
18.96 * (100% + 5%)= 18.96 * 105% = 18.96 *1.05 = 19.91
$19.91
A number is increased by 25% and the resulting number is then decreased by 20%. The final number is what percent of the original number?
A. 90%
B. 95%
C. 100%
D. 105%
E. 120%
(x * (100%+25%)) *(100% - 20%) =
(x * (125%)) *(80%) =
(x * (1.25)) *(.8) =1.25x * .8 = 1x
1 = 100/100 = 100%
C