Percent Increase
Percent Decrease
Percent Change/ Error
Circumference of a circle
Area of a Circle
100
A pencil is 3 inches long. A small marker is 7% longer than the pencil. How long is the marker?
3.21 inches
3 * 1.07 = 3.21
100
A candy bar is 3 inches. The company is now making them 7% shorter. How long is the new smaller candy bar?
2.91 inches
100% - 7% = 93% --> 0.93
3 * 0.93 = 2.91
100
Last year I collected 90 Pokémon cards this year I only collected 45 cards. What is the percent decrease from last year?
new - old / old x 100
50% decrease
((45 - 90)/90)* 100 =50
100
What is the formula for finding the circumference of a circle?
C=pid
100
What is the formula for finding the area of a circle?
a = pi r^2
200
Flynn bout a computer for $550. A 11% sales tax is applied. How much is the final cost after tax.
$610.50
550 * 1.11 = 610.50
200
Flynn Bought a computer that is $550. He has a 15% off coupon. How much is the computer after the discount?
$465.50
100% - 15% = 85%
550 * 0.85 = 465.50
200
The population in Bend, Oregon is about 113,000 people. 30 years ago the population was about 91,000 people. By what percent did the population increase?
New population - old population/ old population x 100
24.18%
((113000-91000)/91)*100 = 24.18
200
What is the circumference of a circle with a diameter of 5in?
15.7 inches
c=pid
c=5pi
c=15.7
200
What is the area of a circle with a radius of 2 units?
12.56 units squared
a=pir^2
a=2*2*pi
a=4pi
a=12.56
300
The price of a new car is $40,700. If the price of a car increased by 2.9%, what would the price be next year?
$41,880.30
40,700 * 1.029 = 41,880.30
300
The price of Labubus are going down by 70% next year. If a pink Labubu cost $75 this year, how much should a pink Labubu cost next year?
$22.5
100% - 70% = 30% --> 0.30
75 * 0.30 = 22.5
300
The population of Renton, Wa is about 54,000 people. 10 years ago it was 52,000. By what percent did the population increase over the last 10 years?
3.85%
300
What is the circumference of a circle if the diameter is 14.3 cm?
44.90 cm
c=pid
c=14.3pi
c=44.90
300
What is the area of a circle with a radius of 5.45 cm?
93.26 cm squared
a=pir^2
a=5.45*5.45*pi
a=29.70*3.14
a=93.26
400
Write an equation to represent the price of any car as it increases by 2.9%. Use t to represent this year's price and n to represent next year's price.
n = 1.029t
400
Write an equation to represent the relationship between the discount price of any Labubu as is it decreases in value by 70%. Use d to represent the discount price of the Labubu and p to represent its original cost.
d = 0.30p
400
The temperature in a room is 70 degrees F. A thermometer measures 72.3% degrees F. What is the percent error in this situation?
Measured - Actual (wanted) / Actual (wanted) X100
3.29%
((72.3-70)/70)*100=3.29
400
What is the circumference of a circle with a radius of 7.5?
47.10
c=pid
r=7.5 d= 15
c=15pi
c=47.10
400
What is the area of a circle with a diameter of 10.2 inches?
81.67 inches squared
a=pir^2
d=10.2 r=5.1
a=5.1*5.1*pi
a=26.01pi
a=81.67
500
The price of a tuck increased by 2.9% since last year. The new price is $30,000. What was the price last year?
Hint:
new price = old price * 1.029
$ 29,154.52
new price = old price * 1.029
30000 = old price * 1.029
30000/1.029 = 29154.52
500
the price of a Labubu after a 70% discount is $21. What was its original cost?
$70
100% - 70% = 30% --> 0.30
d = 0.30p
21 = 0.30p
21/0.30=p
p = 70
500
Ash wanted to cut a piece of metal 15.7 inches long. They accidentally cut it 13.5 inches. What is the percent error in this situation?
14.01%
((13.5-15.7)/15.7)*100=14.01
500
What is the circumference of this shape?
28.56
c=pid
c=(pid)/2
c=(8pi)/2
c=12.56
p= 4+4+8=16
p=16+12.56
p=28.56
500
What is the area of this shape?
57.12 inches squared
a=pir^2
a=(pir^2)/2
a= (4*4*pi)/2
a=25.12
a=4*8=32
a=32+25.12=57.12