Rates and Proportions
Is this a proportion?
3/15 and 5/15
What is 3/4 as a decimal?
0.75
21 is 15% of what number?
140
The math book was originally $10. The bookstore placed it on sale for $5. Find the percent of decrease.
50% decrease
You buy a brand new car for $32,000. The car salesman gets a 10% commission.
How much money does the salesman get?
$3,200
Is this a proportion?
12/15 and 24/35
No
What is 0.25 as a fraction?
50 is what percent of 160?
31.25%
A sandwich was originally priced at $5 and is now $7. Find the percent of increase.
40% increase
You go out to lunch with your friends and spend $45. The tax for food is 8%.
What is the total cost for the meal after tax?
Bill : $45
Tax: $3.60
Total: $48.60
Is this a proportion?
5 10
__ , ___
20 40
Yes
What is 0.25 as a percent?
25%
You got a 28 out of 31 on your test! What percent did you get correct? Round to the whole number
90%
Tyler was 60 inches tall at his last check-up. Next time he was measured at 66 inches tall. Find the percent of increase.
10.5% increase
Your DoorDash driver does a terrific job and you want to tip him 30%. Your food costs $30.40 in total.
What is the total price after the tip?
Bill : $30.40
Tip : $9.12
Total:$39.52
At Walmart, apples are on sale 15 for $17.70. Find the unit cost.
$1.18 per apple
What is 32% as a decimal?
0.32
There are 15 students in Mrs. Jones’ class who are going to the band competition. If 60% of her students are going to the competition, how many students are there in the class in all?
There are 25 students in all
Sharon bakes 83 cookies for her classmates. Her brother ate some of the cookies and now 60 cookies remain.
Find the percent decrease.
27.7% decrease
Kim buys a new phone. It is on sale for 10% off. It costs $1,200 before the sale.
What is the sale price?
Full price : $1,200
Discount : $120 off
Sale Price: $1,080
If I drive 149 miles in 2 hours, how fast did I drive?
74.5 miles per hour
What is 50% as a fraction?
1/2
The are 12 girls on the volleyball team. This represents 20% of the girls who tried out. What’s the whole amount of girls that tried out for the volleyball team?
60 girls tried out for the volleyball team
Last week, Zoe’s sunflower measured 4 inches. This week, it measured 10 inches.
FInd the percent increase.
150% increase
The school store buys bags of chips for $0.50 each. They mark up the price 50%.
How much do they sell the bags of chips for?
Cost : $0.50
Markup : $0.25
Total Price: $0.75