wikiHow Fraction Calculator There are different types of fraction problems, but I can provide some general steps to solve them. You can use a calculator to do the math for you. Simplifying Fractions: To simplify a fraction, divide both the numerator and denominator by their greatest common factor (GCF). * For example, if you have the fraction 12/24, the GCF of 12 and 24 is 12. Divide both the numerator and denominator by 12 to get 1/2. Adding and Subtracting Fractions: To add or subtract fractions, you need to find a common denominator first. The common denominator is the least common multiple (LCM) of the denominators. Then, convert the fractions to have the same denominator, and add or subtract the numerators. * For example, to add 1/4 and 2/5, the LCM of 4 and 5 is 20. Convert both fractions to have a denominator of 20, so 1/4 becomes 5/20, and 2/5 becomes 8/20. Then, add the numerators to get 13/20. Multiplying and Dividing Fractions: To multiply fractions, multiply the numerators and denominators separately. To divide fractions, invert the second fraction and multiply. * For example, to multiply 2/3 and 5/8, multiply the numerators (2 and 5) to get 10, and multiply the denominators (3 and 8) to get 24. So the answer is 10/24, which can be simplified to 5/12 by dividing both the numerator and denominator by their GCF. For division, to solve 2/3 ÷ 4/5, invert the second fraction to get 5/4 and multiply by the first fraction. So, 2/3 ÷ 4/5 = 2/3 x 5/4 = 10/12, which simplifies to 5/6. Page