Finding the whole
You invest in a stock and it goes up 10%. It's now worth $88. What was the original stock price?
$80
A bank offers 3% simple annual interest. You deposit $8,000 and hold it for 15 years. How much interest have you earned?
$3600
The number of students in a classroom increase from 26 to 32. Find the percent increase to the nearest tenths.
23.1%
Maru is dining out and receives a bill of $24. Tax is 8.5%. She also decides to leave a 20% tip(applied pre-tax). How much does she pay?
$30.84
There are 180 Lab 7th graders. Of those, 40% have a favorite subject of Math. Of those whose favorite subject is Math, 25% of them have a favorite unit of number theory. How many 7th graders have a favorite unit of number theory?
18
The price of a radio is on sale for 30%. It now costs $42. What was the original price of the radio?
$60
A bank offers 2.75% annual simple interest. You deposit $12,000. How much interest have you earned in 13 years?
$4290
Sam measured the width of the folder to be 8.65in. The actual measurement is 8.8 in. What is the percent error rounded to the nearest tenth?
1.7%
The prices of materials have gone up, so Jas is raising all her prices by 20%. If the sale price of a laptop is originally $850, how much does it cost now after tax? Tax is 8.875%
$1110.53
Shank collects rocks. 25% of his collection consists of sedimentary rocks. 35% consist of metamorphic rocks. The remaining 12 are igneous rocks. How many rocks does Shank have?
30
Liana gets 3.25% commision for each apartment she sells. On a recent apartment she made $18,200. How much did the apartment sell for?
$560,000
A bank offers 3.15% annual simple interest. You deposit $43,000. How much interest have you earned in 30 months?
$3386.25
At the grocery store, chocolate bars were priced at 4 for $5. This week, they are on sale for 4 bars for $3. What is the percent change in the price per chocolate bar this week compared to last?
40% decrease
A suit goes on sale for 20%. The owner, being frustrated that it did not sell, drops the current price another 20%. What is the percentage off the original price?
36% off
A cashmere scarf originally priced at $60 is on sale for 30% off. A cashmere sweater originally priced at $70 is 20% off. The total amount saved is what percent of their original prices? Round to the nearest tenths.
24.6%
The price of a stock goes up 28.5%. It is now worth $56.54. What was the price of the stock before this increase?
$44
A bank offers 3.5% annual simple interest. You deposit $25,000 into a savings account. What is the balance of the savings account after 3 1/2years?
$28062.50
The area of a rectangular garden has the dimensions of 8.4 yards by 4.1 yards. Elliot, the carpenter measured the garden to be 8.2 by 4.5 yards. What is the percent error? Round to the nearest percent.
7%
Natso Wise, the business owner decides to increase all items in his shop by 25% before the Holiday Black Friday sale. On Black Friday, he decides to offer a 25% off the entire store that way he doesn't lose money. What is the % discount or markup on each item?
1/16 or 6.25% discount.
Sally is shooting free throws.Out of 30 shots taken, she's made 60% of her shots in. She took 10 more shots and increased her free throw percentage to 65%. How many of the 10 shots did she make in?
8
20% of the cookies are chocolate chip, 15% are raisin, 30% are oatmeal, and the rest are peanut butter. There are 84 peanut butter cookies. How many cookies are there in total?
240
A bank offers 4.4% annual simple interest. You deposit $55,000 into a savings account. What is the balance of the savings account after 21 months?
$59235
The formula to find the area of circle is below. Penny measures the radius to be 2.2, but it was actually 2.3. What is the percent error? Round to the nearest tenths.
pir^2
8.5%
Moni invested money into a stock. The first year it went up 30%, but the next year it drops 15%. The third year it drops another 10% Moni decides to sell. What is his overall percent gain or loss off his original investment?
.55% loss
Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks. After adding more purple socks, Jamal noticed that there is now a 60% chance that a sock randomly selected from the drawer is purple. How many purple socks did Jamal add?
9