In order to add fractions that are not alike, you will need to find the lowest common denominator. This is the least common multiple of the fractions. To add 2/3 plus 1/5, you will need to find the lowest common denominator. Here, it is best to think of all of the multiples of the denominators. If it helps, make a list. For 3, it is 3, 6, 9, 12, 15, etc. For five, the multiples are 5, 15, 20, 25, etc. The lowest number that they have in common is 15. This is your lowest common denominator. Next, you will need to multiply your numerator by the same number that you used to get 15 for the denominators. It should look like this: 10/15 +3/15.
 Hot
 Latest

How To: Remember "greater than" & "less than" symbols

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Convert between diameter and radius

How To: Find the perimeter & area of a complex figure

How To: Convert fractions to percents in two steps

How To: Calculate Faster Than a Calculator

How To: Find the coordinate of a point

How To: Divide small numbers by big numbers

How To: Find a number given Its percent

How To: Solve direct proportions

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the equation of a circle given: center & tangent

How To: Factor a trinomial with negative leading coefficient

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the area of a parallelogram using geometry

How To: Find a missing coordinate given: coordinate & equation

How To: Learn Calculus in 20 minutes

How To: Remember "greater than" & "less than" symbols

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Convert between diameter and radius

How To: Find the perimeter & area of a complex figure

How To: Convert fractions to percents in two steps

How To: Calculate Faster Than a Calculator

How To: Find the coordinate of a point

How To: Divide small numbers by big numbers

How To: Find a number given Its percent

How To: Solve direct proportions

How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the equation of a circle given: center & tangent

How To: Factor a trinomial with negative leading coefficient

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Find the area of a parallelogram using geometry

How To: Find a missing coordinate given: coordinate & equation

How To: Learn Calculus in 20 minutes
Be the First to Comment
Share Your Thoughts