Percents
80% of 120 is what number?
96
What is the increase formula?
difference of two numbers divided by smaller number
What is the formula for percent error?
difference of actual and estimated divided by actual
What is the decrease formula?
difference of two numbers divided by larger number.
What percentage of 60 is 15?
25%
51% of what number is 19?
37.3
The manufacturers of M&Ms decided to do a promotion where they increased the number of M&Ms in a package from 85 to 120. Rounded to the nearest percent what is the percentage increase did this promotion represent for the consumer?
41%
A measurement was 34.5 m. The accepted value is 36.7 m, This is the percent error of the measurement?
5.99% error
A shirt was $36.00 and is now $25.00. What is the percent decrease?
30.5%
Each week, Mr. Jones goes to the grocery store. Mr. Jones estimates that he will spend $120 when he goes to the grocery store this week. he actually spends $94. Find the percent of error.
28%
What is 40% of 480 people?
192
Movie Tickets used to be $8.00 and now they are $12.95. How much did the price increase?
$61.88
Eva estimates that 475 songs will fit on her MP3 player. The actual amount of songs that fit is 380. Find the percent of error.
25%
Suppose the original quantity is 160 and the new quantity is 104. What is the expression for the percent decrease? What is the percent decrease?
(160-104) / 104, and 35%
DOUBLE JEOPARDY
What is Eddie's middle name?
Joseph
What is 10% of $113?
$11.30
Find the percent increase: 140 is increased to 273
95%
Tray estimates that a new car will cost him $11,300. It actually cost him $10,800. What is the percent of error rounded to the nearest tenth?
4.6%
A bicycle priced at $300 goes on sale for $180. What is the percent change? Was it an increase or decrease?
40% decrease.
A custom estimates a computer at an electronics store is $1099. Determine the percent of error in price if the actual price is $1349. Round to the nearest whole percent.
19%
What percent of 34 is 34?
100%
Last year the 7th grade had 280 students. This year the number changed to 350 students. What was the percent change? Was it an increase or decrease?
25% increase.
Rodney want to practice free-throws. He estimates the distance from the free-throw line to the hoop and marks it with chalk. Rodney's estimate was 13.5 feet. The actual distance should be 15 feet. Find the percent of error.
10%
A bus ticket normally costs $45. As a special offer, the price is reduced to $27. What is the percent change? Was it an increase or decrease?
40% decrease.
Last school year the enrollment at Genoa Middle School was 465 students. This year the enrollment is 525. Find the percent change.
13%