Percents (no calculators)
Without using a calculator, what is 10% of 35?
3.5 (.10 x 35 = 3.5)
4/5
80%
What is 50% of 12?
12 x .5 = 6
An antique bed frame that originally cost $500 is marked up by 60%. What is the mark-up price of the bed frame?
$500 x .6 = $300 increase
$500 + $300 = $800 marked up price
Today's store is offering a 20% discount on everything. The regular price of a T shirt is $26. What is the price after the discount is applied?
26 - (26 x .2) = discount price
26 - 5.2 = $20.80 discount price
Convert to a percent
2/9
22% (2 divide by 9 is .2222222222)
What is 20% of 70?
14 (70 x .20 = 14)
1/20
5% (0.05 think of you need 20 nickels to equal 100)
Convert 130% to a decimal and a reduce fraction
1.3 to
130/100 = 13/10
A $30 book is marked down by 20%. What is the discounted price of the book?
$30 x 0.2 = $6 decrease
$30 - $6 = $24 discount price
Today a store is offering a 20% discount on everything. The discounted price of a hat is $88. What is the original price of the hat?
OP - .2OP = 88
.8OP = 88
88/.8 = $110
A car is 280 inches long. A truck is 65% longer than the car. How long is the truck?
280 + (280 x .65) = truck
280 + 182 = 462 inches
What is 40% of 13?
5.2 (13 x .40 = 5.2)
0.14
14%
Convert 8% to a decimal and reduced fraction
.08 to
8/100 = 2/25
A sales person makes a 5% commission off a $2000 item. How much money is this?
.05 x $2000 = $100
Today a store is offering a 20% discount on everything. How much will you save on a $100 item?
$20 (100 x .2 = 20)
Tyler's brother works in a shoe store. Tyler's brother earns a commission. He makes 4.5% of the amount he sells. Last week he sold $1,200 worth of shoes. How much money was his commission?
1200 x .045 = $54 commission
What is 5% of 3?
.15 (3 x .05 = .15)
1.25
125%
Convert 25% to a decimal and reduced fraction
.25 to
25/100 = 1/4
A circular running track is 1/5 mile long. Elena runs on this track, completing each lap in 1/50 of an hour. What is Elena's speed in miles/hour?
0.2 miles/0.02 hour
Lin's father is paying for a $68 meal. He has a 15% off coupon for the meal. If Lin's father leaves a 20% tip on the original cost of the meal ($68). How much money is the tip?
68 x .2 = $13.60 tip
The store bought a pair of shoes for $50 (wholesale price), and sold it for $120 (retail price). What percentage was the markup?
markup: retail - wholesale
% markup: (markup / wholesale price ) x 100
% markup: 70/50 x 100 = 140%
What is 100% of 15?
15 (15 x 1.00 = 15)
0.05
5%
Convert 150% to a decimal and reduced fraction
1.5 to
150/100 = 15/10 = 3/2
Diego measured the length of a pen to be 21.5 cm. The actual length of a the pen is 22.5 cm. What is the percent error for Diego's measurement?
estimate - actual / actual
1/22.5
0.44
4.4%
Lin's father is paying for a $68 meal. He has a 15% off coupon for the meal. After the discount, a 5.5% sales tax is applied. What does Lin's father pay for the meal?
68 x .15 = 10.2 discount
68 - 10.20 = $57.80 subtotal
57.8 x .055 = $3.18 tax
57.8 + 3.18 = $60.98
Tyler's brother earns $18 per hour. The store offers him an 8% raise per hour. After the raise, how much money will Tyler's brother make per hour.
18 x .08 = 1.44 (raise)
18 + 1.44 = $19.44 per hour