How to Add FractionsTo add fractions, the formula is:
a/b + c/d = (ad + bc) / bd.
For example: 3/8 + 2/4 = (3*4 + 2*8) / 8*4 = 28 / 32.
To reduce this fraction, first find a common factor, in this case a 4 goes into both numbers. Next, divide the numerator and denominator by 4 and the answer is: 7 / 8 (4 goes into 28 - 7 times and 4 goes into 32 - 8 times).
How to Subtract FractionsTo subtract fractions, the formula is:
a/b - c/d = (ad - bc) / bd.
For example: 3/6 - 1/5 = (3*5 - 1*6) / 5*6 = 9 / 30.
To reduce this fraction, find a common factor that goes into both numbers, in this case a 3 goes into both. Next, divide both numerator and denominator by 3 and you get 3 / 10.
How to Multiply FractionsTo multiply fractions, the formula is:
a/b * c/d = ac / bd.
For example: 3/8 * 2/7 = 3*2 / 8*7 = 6 / 56.
To reduce this fraction, find a common factor that goes into both numbers (numerator and denominator), in this case a 2 goes into both. Divide both by 2 and the answer is 3 / 28; 6/56 is reduced to 3/28.
How to Divide FractionTo divide fractions, the formula is:
a/b ÷ c/d = ad / bc.
For example: 1/3 * 7/5 = 1*5 / 3*7 = 5 / 21.
This problem cannot be reduced any further.
x / y is sometimes called x over y.
A helpful hint: When doing fractions, a way to think of where each number goes is to think of your problem in the following way:
If you got 7 answers right and there were 10 questions on a test, then to find your score you would say 7 out of 10, so to do the math you would write 7 / 10. The top number (numerator) is the part and the bottom number (denominator) is the whole.
Welcome to Online Calculator Free!
OnlineCalculatorFree.org provides easy to use quick reference online calculators that solve basic or scientific problems for school, business or personal use. I have been working on this site for a few months now, and while there are still a lot of calculators that I haven't created yet we offer quite a few. So far we cover the following areas of math; algebra, geometry, finance, health, statistics, math, loans, and more. Our calculators are online for free! If you have a suggestion, please contact us.
Thank you for visiting our site.