3-1: Analyze Percents
What is 25% as a decimal?
0.25
What is a proportion?
Two fractions set equal to each other.
Fill in the blank:
Part = ________ x Whole
Percent
Find the Percent Change:
Original Amount: 80
New Amount: 100
25% increase
What is the Simple Interest Equation?
Interest = Principal x Rate
What is 80% of 260?
208
Solve the following proportion for x:
4/20 = x/180
x = 36
Solve for the Part:
Part = 0.62 x 850
Part = 527
Find the percent increase or decrease:
Original Amount: 150
New Amount: 120
20% decrease
Find the interest if the principal = $3,000 with 25% interest.
(Hint: I = p x r)
$750
What is 160% of 98?
156.8
Solve the following proportion for x:
45/12 = x/66
x = 247.5
Michael earns a 6% commission on each house he sells. If he sells a house for $180,000, how much does he earn in commission, c?
$10,800
Juan’s puppy weighed 16 pounds at the age of 2 months. The puppy weighed 60 pounds at the age of 8 months. What is the percent change in the puppy’s weight?
275%
Yuni loaned $400 to her brother. He will repay the loan by paying 2.5% simple interest for 3 years. How much will he pay in interest?
$30
What is 0.8% of 1046?
8.368
On Thursday, a restaurant serves iced tea to 35 of its 140 customers. What percent of the customers order iced tea?
25%
Solve for the Whole:
140 = 0.8 x Whole
Whole = 175
Hank buys a used car for $7,200 and plans to sell it on his used car lot. What is the price of the car after a markup of 15%
$8280
Solve for the interest rate:
$450 = $1250 x r
36% interest
A company charges a shipping fee that is 4.5% of the purchase price for all items it ships. What is the fee to ship an item that is $56?
$2.52
40/160 = 85/x
x = 340
Sharon paid $78 sales tax on a new camera. If the sales tax rate is 6.5%, what was the cost of the camera?
$1200
Nya wants to buy a sweater that had an original price of $55. The sweater is now discounted 20% and the sales tax rate is 5.5%. How much will Nya pay for the sweater?
$46.42
Kelly opened a bank account that earns 1.2% simple interest each year. After 7 years, Kelly will earn $126 in interest. How much did Kelly deposit when she opened the account?
$1500