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Basic Math2
Math Rules
| Question | Answer |
|---|---|
| LCD | least common denominator |
| GCF | greatest common factor |
| What is LCD of two or more fractions? | The smallest number that can be divided equally by each of the fractions denominators. |
| How to determine the GCF? | The number that goes into both numbers evenly. |
| How to find the LCD? | Multiply the denominators together and divide by the GCF. |
| Find LCD of 2/9 + 3/12? | Multiply denominators (9x12)=108 then, divide by LCD which is 3 (108 divided by 3)=36 |
| What is a Proper Fraction? | A fraction with the numerator smaller than the denominator. |
| What does Simplify a fractions means? | To use all common factors to bring fraction to lowest terms. Example: 16/24 (4 is Common factor) ANSWER: 16/24 = 8/12 = 4/6 = 2/3 |
| How to convert % to fraction? | Make a fraction with % as numerator and 100 as denominator. Simplify/reduce fraction if possible. |
| A Percent converted to a fraction | 7% = 7/100 |
| How to convert decimals to percents? | Multiply decimal by 100 or move decimal 2 places to right and add % sign to answer. |
| A decimal converted to percent | 0.39 = 0.39x100=39% |
| How to convert percent to decimal? | Divide % by 100. Round answer if needed. |
| A percent converted to decimal | 83% = 83 divided by 100 = 0.83 |
| How to find the percent of a number? | Divide first number by second number. Multiply answer by 100 or simply move decimal 2 places to right. Round answer and follow with a % sign. |
| 68 is what % of 87 | 78% |
| 75% of 24 km? | 18 |
| What is sale price of a $20.00 item discounted by 25%? | $15.00 |
Created by:
karen.evans83@yahoo.
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