A fraction represents a part of a whole. The denominator tells you how many equal parts the whole is divided into, and the numerator tells you how many of those parts you have.

To find equivalent fractions, multiply or divide both the numerator and denominator by the same number. For example, 1/3 = 2/6 = 3/9. To simplify a fraction, divide both parts by their greatest common factor.

To add or subtract fractions, they must have the same denominator (a common denominator). Find the least common denominator, convert each fraction, then add or subtract the numerators. To multiply fractions, multiply numerators together and denominators together. To divide fractions, multiply by the reciprocal of the second fraction.

Fractions connect to decimals and percentages. To convert a fraction to a decimal, divide the numerator by the denominator.