Fractions, Decimals, Percents
How do you find the percent (p%) of any number (n)?
multiply p/100 by n
--> (p/100) x n
IN OTHER WORDS
turn p into a decimal by dividing by 100
and multiplying it by your number
21.114 - 14.28= ?
6.834
8 -4 + 6 / 2 + 7
0
What is surface area?
The area of all surfaces added together
In a class there are 30 boys and 12 girls. Determine the ratio of number of boys to girls.
5:2
The decimal form of 1/8 is...
0.125
1.63 × .079 = ?
0.12877
42
The area of a rectangle is 121 sq ft. The height is 15 sq ft. What is the base?
(round to nearest hundredth)
8.07 ft
An ice cream shop uses the following ingredients to make 1 sundae: 2 scoops of ice cream, 4 spoonful of sprinkles, and 2 tbsp whipped cream.
How many sundaes did the shop make if they used 32 spoonfuls of sprinkles?
8
What is 4/5 written as a percent?
80%
185.78 / 6 = ?
(round to nearest thousandth)
30.963
(round to nearest hundredth)
7.56
What is the area of a parallelogram with a width of 13.9 centimeters and a height of 22.4 centimeters?
311.36 sq cm
A jar is filled with pennies and nickels in the ratio of 5 to 3. There are 30 nickels in the jar, how many coins are there?
80 coins (pennies and nickels)
Express 50/1000 in decimal form.
0.05
(18.2 + 2.5 x 3.25) / 6.15
(round to nearest hundredth)
4.28
(180/9)2 - 15 / 3
80
What is the surface area of cube with side length equal to 5 cm?
150 sq cm
At the start of the week a bookshop had science and art books in the ratio 2:5. By the end of the week, 20% of each type of books were sold and 2240 books of both types were unsold. How many books of each type were there at the start of the week?
800 science books and 2000 art books
To change a decimal to a percent, you...
multiply by 100
___________________
(50 - 42 + 2x)
5x + 1/2
10 × 4 - 2 × (4² ÷ 4) ÷ 2 ÷ 1/2 + 9
41
If surface area of cube is 486 sq meters, find the side length.
9 meters
The perimeter of a rectangle is equal to 280 meters. The ratio of its length to its width is 5:2. Find the area of the rectangle.
4000 square meters