Fractions & Decimals
How do you change 3/8 to a decimal?
Divide 3 by 8.
Write in scientific notation:
0.000000005301
5.301 x 10-9
How do you change a decimal to a percent?
Multiply it by 100.
What is a ratio?
A comparison of two numbers.
639.3 ÷ 7.5
85.24
5.79 × 102 ________ 0.579
Use <, >, or =.
5.79 × 102 > 0.579
What is 15% of 24?
3.6
Do the ratios 3:6 and 16:8 form a proportion?
No.
Write your answer as a mixed number.
4/5\div6/25
1 1/3
What is the greatest common factor of 40 and 100?
20
What is 87.5% of 56?
49
54/24=9/x
x = 4
A member of the school track team ran for a total of 179.5 miles in practice over 12.5 days. How many miles did he average per day?
14.36 miles.
What is the least common multiple of 4, 8, 5, and 10?
40
Adelaide ate at a restaurant. The bill was $54 and she left an 18% tip. How much was the tip?
$9.72
If there are 48 ounces in 3 pounds, how many pounds are there in 1,456 ounces?
91 pounds
A farmer planted 7 1/5 acres of land with 9 types of wheat. If he planted an equal amount of each type of wheat, how many acres of each type did he plant?
4/5
Johnny and Ryan are playwrights. A literary critic notices that the two playwrights have written the same number of acts during their careers, even though all of Johnny's plays have 10 acts and all of Ryan's plays have 3 acts. What is the smallest number of acts each must have written?
30
Megan buys a carousel horse during a sale. It is 40% off. If the original price was $480, how much does Megan pay?
$288
A 12 oz box of Thanksgiving stuffing is $2.30 while a 16 oz box is $2.88. What is the unit cost of each AND which is a better buy?
The 12 oz box costs 19 cents per ounce.
The 16 oz box costs 18 cents per ounce.
So, the 16 oz box is the better buy.