Percents
What is 24% of 90?
Write an equation and solve.
x=0.24(90)
21.6
Lily can do 6 math problems in 10 minutes. How many can she do in 5 minutes?
3 math problems
$600 at 5% for 2 years
a) Write an equation.
b) Find the interest earned.
c) Find the balance of the account.
a) I=600(0.05)(2)
b) $60
c) $660
Woody bought a new coat that was $42, but he got a 15% discount. What was the sale price?
a) Write and equation,
b) find the sale price
a) 42(0.85)=n
b) $35.70
Megan buying a pair of jeans that costs $40. They are on sale for 20% off. How much will they cost?
Write an equation and solve.
40(0.8)=x
$32
What is 45% of 85?
Write an equation and solve.
x=0.45(85)
38.25
Parker earned $35 shoveling snow for 5 driveways. How much will he earn shoveling 8 driveways?
$56
$24 interest earned on $400 invested for 2 years
a) Write an equation.
b) Find the interest rate.
a) 24=400(r)(2)
b) 3%
Sumeya bought a painting of her favorite math teacher for $140. After she marked it up 25%, she sold it to Sydney.
a) Write an equation,
b) find the sale price Sydney paid.
a) 140(1.25)=n
b) $175
Marty goes to a restaurant and orders a meal that costs $12. He is going to give an 18% tip. What will his final bill be?
Write an equation and solve.
12(1.18)=b
$14.16
20 is 80% of what number?
Write an equation and solve.
20=0.8x
25
You can buy 14 spirals for $21. How many spiral can you buy for $36?
24 spirals
$450 interest earned on $2400 loan at 7.5%
a) Write an equation.
b) Find the amount of time.
a) 450=2400(0.075)t
b) 2.5 years
Luciano got a discount of 32% off an autographed photo of his favorite math teacher that was originally $112.
a) Write an equation,
b) find the price he paid.
a) 112(0.68)=n
b) $76.16
Noelia is buying new computer that costs $820. The sales tax is 6%. What will her final cost be?
Write an equation and solve.
820(1.06)=b
$869.20
15 is what percent of 75?
Write an equation and solve.
15=75x
20%
It is 40 miles to get from Naperville to Chicago. On the map it is 5 inches from Naperville to Chicago. Berwyn is 2 inches from Chicago on the map. How many miles is it from Berwyn to Chicago?
16 miles
A savings account earns 5% simple interest per year. The principal is $1200. What is the balance after 4 years?
$1440
Natalia & Noe bought their favorite math teacher a phone. They paid $90 after an 80% discount.
a) Write an equation,
b) find the original price.
a) 90=0.20x
b) $450
Claire takes her whole family out to eat and the food costs $57. She leaves a 20% tip. What will the final cost be?
Write an equation and solve.
58(1.2)=b
$68.40
64 is what percent of 200?
Write an equation and solve.
64=200x
32%
A rectangle starts at a height of 18 and a width of 10. It is scaled down to a height of 4.5. What is it's new width?
2.5
You pay $54 interest on a loan with a rate of 4.5% for 18 months.
a) Write an equation.
b) Find the principal of the loan.
a) 54=P(0.045)(1.5)
b) $800
Adelaide & Naomi bought lunch for their favorite math teacher. Their bill was $53.33 but they had a 25% off coupon.
a) Write an equation,
b) find the discount price they paid. Round to the nearest penny.
a) 53.33(0.75)=n
b) $40
At a restaurant you order a meal that costs $16.60. You also pay 15% tip and a 7% tax. What is the final cost?
Write an equation and find the cost. Round to the nearest penny.
16.60(1.22)=x
$20.25