Conversions
Change 75% into a decimal
0.75
Which of the following procedures would correctly change 0.38 to a percent
a) Divide 0.38 by 100
b) Multiply 0.38 by 100
c) Multiply 0.38 by 10
d) Divide 0.38 by 10
b) Multiply 0.38 by 100
155% as a decimal
1.55
At a movie theater, the 7:00pm showing sold 75% of the tickets available. If the theater seats 900 people, how many tickets were sold?
675
Sara makes 8% commission on her sales. If she sold $5350 of merchandise last week, what was her commission?
$428.00
Change 4.2% into a decimal
0.042
a) $32.00
b) $40.00
c) $48.00
d) $76.80
e) $112.00
c) $48.00
Serena purchased a tennis racket that regularly costs $75.00. It was on sale for 20% off. How much was the discount?
$15.00
Bill bought a shirt for $35.80 plus he paid an additional 7.5% in sales tax. What was the final cost?
$38.49
Alex went to a restaurant and ordered $48 worth of food. He wanted to give his waiter a 18.2% tip. How much was his total?
$56.74
Change 0.0031 into a percent
0.31%
The price of a dinner at Umberto's is $140. You leave a 20% tip. Which of the following expressions could represent total amount of money you spent?
a) 140(0.20) b) 140(0.80) c) 140(1.20)
c) 140(1.20)
Change 330% into a fraction
33/10
A store buys cell phones from the manufacturer for $34.40 and marks them up by 85%. How much do they charge for the phones (what is the retail price)?
$63.64
Kenna spent $900 of the $1200 jackpot she has won on clothing. What percent of her jackpot did she spend on clothes?
75%
What percent of 90 is 9?
10%
In the last year, Bob's savings account increased from $1,000 to $1,570. What percent increase is this?
a) 1,570%
b) 570%
c) 57%
d) 36.3%
e) 5.7%
c) 57%
The price of a dinner for the Ms. B and her friend was $30. They left an 18% tip. Which of the following expressions CANNOT represent total amount of money they spent.
a) 30 + 30(0.18) b) 30(1.18) c) 18(1.30) d) 30+30(9/50)
c) 18(1.30)
Mrs. Rogers sold 49 out of 78 crafts at the fair. What percent of her crafts did she sell? Show your proportion or equation set-up.
62.8%
A student estimated a mass to be 250g, but upon carefully measuring it, found the actual mass to be 240g. What is the percent error?
4.17% or about 4.2%
Change 3 and 1/4 into a percent
325%
Over the summer, Kathleen swam in 45 swim meets. She won 27 meets. What percent of the swim meets did she win?
a) 27% b) 40% c) 43% d) 60% e) 80%
d) 60%
Mike bought a barbecue set for $175.99 plus 6% sales tax. What was his total cost?
$186.55
A new top-selling DVD is marked 20% off at Discount DVD, where it normally sells for $29.90. The same disc sells for $28.60 at Value Video, where you have a coupon for 15% off anything in the store. Where would you buy the DVD? Explain how you decided and be sure to include work to support your answer
Discount DVD: $23.92
Value Video: $24.31
Better choice: Discount DVD because it is cheaper
The ratio of men to women at the ice cream social was 3 to 5. What percent of the people attending were men?
37.5%