Percents, Decimals, Fractions
What is the definition of a percent?
A rate/ratio out of 100
How do you find 50% of a number mentally?
Divide by 2
A farm lets you pick 4 pints of strawberries for $46. What is the cost per pint?
$11.50 per pint
a) 96/100 x 25
b) 96 x 25
c) 0.96 x 25
d) 96/100 x 25/100
a) 96/100 x 25
c) 0.96 x 25
Select ALL of the following options that have the same value as "12 is what percent of 30"
a) 12/30 / 100
b) 12/30 x 100
c) 30/12 x 100
d) 100 x 12/30
b) 12/30 x 100
d) 100 x 12/30
a) How do you turn a decimal into a percent?
b) How do you turn a percent into a decimal?
a) Multiply by 100
b) Divide by 100
How do you find 1% of a number mentally?
Divide by 100
If 3 books cost $18, how much do 5 books cost?
$30
What is 30% of 40?
12
65%
The audience thinks 32% of Derek's jokes are funny What fraction of Derek's jokes does the audience find funny?
32/100
How do you find 20% of a number mentally?
Divide by 5
Walmart sells a case of 24 cans for $6.96. Stop & Shop sells 12 cans for $3.96. Which is the better deal?
Walmart with $0.29 per can
Stuart bought a watermelon during a 40% off sale at Stop&Shop. If the original price was $7.50, how much does Stuart save?
$3
At Pinky's, 63 out of the 84 headbands on clearance are velvet. What percentage of headbands on clearance are velvet?
75%
13/10 of a number is what percentage of that number?
130%
How do you find 75% of a number mentally?
1) divide by 4
2) multiply by 3
If Kent drives at a constant speed for 3 hours and travels 186 miles, what is his speed?
62 miles per hour
Damon earns 150% of his regular hourly wage while working overtime. What percent of his regular hourly wage does Damon earn while working overtime if he usually earns $22.50 per hour?
$33.75
In Ms. Murphy's class, 4 students wore blue, 12 students wore red, and 9 students wore green. What percentage of the class wore green?
36%
Turn 10.4 into a fraction and a percent.
1040/100 and 1040%
How do you find 14% of a number mentally?
1) find 10% by dividing by 10
2) find 1% by dividing by 100
3) multiply your 1% by 4
4) add the 4% and the 10% together
Max swims 8 laps in the pool in 20 minutes.
a) How many laps per minute is that?
b) How many minutes per lap is that?
a) 0.4 laps per minute
b) 2.5 minutes per lap
Bill Gates donates 23% of his annual income to charity. What percent of his income does Bill Gates donate to charity if he makes $1,500,000 per year?
$345,000
Gonzalo ordered some green and some yellow soccer balls. He bought 52 soccer balls in all. 13 of the soccer balls were yellow. What percentage of the soccer balls were green?
75%