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Basic Math Practice

Math Practice

Basic Math Practice practice questions – Percent, Fractions Decimals Exponents, and Simple Algebra.

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Practice Questions

1. 8 is what percent of 40?

A. 10%

B. 15%

C. 20%

D. 25%

2. 9 is what percent of 36?

A. 10%

B. 15%

C. 20%

D. 25%

3. Three tenths of 90 equals:

A. 18

B. 45

C. 27

D. 36

4. .4% of 36 equals:

A. 1.44

B. .144

C. 14.4

D. 144

5. The ratio of 8:5 = (?)%

A. 75%

B. 150%

C. 175%

D. 160%

6. 3/5 = (?)% x ?

A. 75%

B. 100%

C. 78%

D. 60%

7. Express 2/5 as a decimal.

A. .33

B. .3

C. .4

D. .5

8. Express .56 as a percentage.

A. 56%

B. .56%

C. 5.6%

D. .056%

9. Express 18/6 as a percentage.

A. 300%

B. 30%

C. 150%

D. 3%

10. Express 4/20 as a percentage.

A. 25%

B. 20%

C. 15%

D. 40%

Answer Key

1. C. Finding the percentage of one number and another.

2. D. Finding the percentage of one number and another.

3. C. Determining percent from a whole number.

4. B. Determining the fractional percentage of a number.

5. D. Determining the percentage of a ratio statement.

6. D. Percentage of a fraction and another fraction.

7. C. Converting common fraction to a decimal fraction.

8. A. Converting decimal fraction to a percentage.

9. A. Converting fraction to percent.

10. B. Converting fraction to percent.

Decimal Tips Tricks and Shortcuts

Converting Fractions to Decimals

Basic Math Video Tutorial

Most Common Basic Math Mistakes

  1. Misreading a problem, simple arithmetic mistakes, or other careless errors
  2. Not showing all of the steps.  This makes it difficult for the teacher to understand how you got the answer.
  3. Not checking your work or not reviewing their test before turning it in.  Never leave the test room early!
  4. Not understanding the problem and solving it with an inappropriate method.  How to Solve Word Problems
  5. Not understanding of basic math concepts and operations, such as fractions, decimals, and basic algebra.
  6. Not paying attention to the units of measure.
  7. Not understanding basic terminology, such as “factor,” “product,” and “quotient.”
  8. Not paying attention to the sign of the answer or confusing the sign.
  9. Not using the correct formula or equation for the problem.
Written by, Brian Stocker MA., Complete Test Preparation Inc.

Date Published: Wednesday, March 27th, 2013
Date Modified: Saturday, June 29th, 2024
author avatar
Brian Stocker MA

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    12 Comments

  1. Inam
    January 20, 2015
    Reply

    Hey how would you do .4% of 36 equals without a calculator

  2. Complete Test Prep
    January 21, 2015
    Reply

    .4/100 = X/36
    so .4 X 36 = 14.4 then divide by 100 which moves the decimal place 2 places to the left 0.144

    So without a calculator, the only part you have to worry about is (.4 X 36) which you can do on scrap paper.

  3. Len
    July 7, 2016
    Reply

    Or you could say that 1/10 of 36 = 3.6, therefore 4/10 of 36 = 14.4, as a Percentage is 100th, divide 14.4 by 100 = .144 (Move the decimal point two to the left)

    Should be able to do all that in your head.

  4. Anonymous
    March 8, 2024
    Reply

    i have no idea but i estimated that the answer might be A because 1.44 is the most likely answer

  5. Andreea
    June 21, 2015
    Reply

    How do you calculate:
    3/5 = (?)% x

    Thx

  6. Complete Test Prep
    June 25, 2015
    Reply

    Hi – 3/5 = x/100; cross multiply, so, 300 = 5x; divide both sides by 5, so, 60 = x

    so 3/5 is 60%.

    There is a shorter way since 100 is divisible by 5

    3/5 = x/100 – multiply both sides by 5, so 3/1 = 5x/100 = 3 = x/20; multiply both sides by 20, so
    60 = x.
    Or you can just do that in your head!

  7. Konichiwa
    September 21, 2015
    Reply

    You guys are all stupid, I did these questions in five seconds and you are asking what three fifths equal in percentage?

  8. MM
    December 3, 2017
    Reply

    That is so rude of you. we are all leaners here . not that we don’t know it, but want to know more. people still learn no matter how smart they are. please stop.

  9. Yazmurat
    July 30, 2018
    Reply

    Thats so true ;). Whatever, its just people these days.

  10. Mindy
    September 21, 2018
    Reply

    Wow!! I can’t believe you would dare to say such a thing. I usually don’t comment on things like this, but I had to speak up here.

    No one is stupid, nor is there a such thing as a stupid question. If you don’t know you ask so you can grow. Those that fail to ask plan to fail. You can’t call people stupid, because they may be at another level than you are. If you were asking such a question, I’m sure you wouldn’t want anyone to judge you and call you out of your name (in which no one can probably pronounce.).

  11. hitan
    October 18, 2018
    Reply

    u dont need math for that 3/5 is 60 since 2 times 5 is 10 which is 100% and 3 times 2 is 6 where as the problem is 60percent

  12. noyon khan
    November 1, 2018
    Reply

    how will I do ratio

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