Percent of a number
What is 90% of 250?
225
In this problem are you solving for the whole, part, or the percent? 34% of what number is 51?
Whole
Find the percent change.
Original amount: 16
New amount: 11
(New-old)/old then multiply by 100
31%
A water bottle costs $9.45. Sales tax is 7%. What is the total cost?
$9.52
Starting money = $350.
Interest rate = 2.5%
TIme = 3 years.
How much interest?
I=PRT
$26.25
What is 10% of 340?
34
In the question,
"35 is what percent of 40?"
What is the 35?
Part
Find the percent increase. Round to the nearest percent.
From $5 to $8
(New-old)/old then multiply by 100
60%
A baseball bat cost $28. There is a 25% discount. What is the total cost?
$21
Find the simple interest earned for principal of $2,000 at and 8% rate for 5 years.
I=PRT
I=?
P=2000
R=8%
T=5
$800
What is 30% of 50
15
26 is 5% of what number?
Is/of=percent/100
part=percent*whole
520
Mrs. Ciampa had 27 students in her class last year and this year she had 30 students in her math class. What is the percent of change?
(new-old)/old then multiply by 100
11%
At McDonald’s a McChicken cost $1.49. Meals tax is 5%. What is the total cost?
$1.56
Jerry borrowed $4,000 for 5 years at 6% simple interest rate. What formula would I use to solve that
I=?
P=4,000
R=6%
T=5
I=4,000(0.06)(5)
What is 12% of 40
4.8
What is 20% of 75?
Is/of=percent/100
part=percent*whole
15
Jessie estimates the weight of her cat to be 8 pounds. The actual weight of the cat was 10 pounds. Find the percent error.
(Estimate-Actual)/Actual then multiply by 100
20%
Sam bought an $85.00 jacket for 40% off of the regular price. How much did he pay for the jacket?
$51
Ann puts $300 in a bank account earning 4% interest. How much will she earn in interest in 1 year?
I=PRT
$12
What is 140% of 20
28
Joey gives away 3 out of 20 coins in his collection. What percent does he give away?
is/of=percent/100
part=percent*whole
15%
Zed went to the store and bought a bag of chips. He estimated there would be 350 chips in the package, but realized there were only 210 chips in that package. What was his percent error?
(estimate-actual)/actual then multiply by 100
67%
You went to dinner and your total bill was $45.67. You wanted to leave a 22% tip. How much did you pay in total?
$55.72
Julie borrowed $3,500 for 3 years at 7.5% simple interest rate.
How much interest is that?
I=PRT
$787.50