Fraction - rational number representing a part of whole piece or (more generally) any number of equal parts, Numerator - A number in upper part of a fraction, which shows how many equal part there are in that fraction, Denominator - A number in lower part of a fraction which shows have many equal pieces are in one whole, Fraction bar - the line separation numerator and denominator, Reduction - reducing numerator and denominator by the same numer, Expanding - multipying numerator and denominator by the same number, + - addition, - - substraction, / - division, x - multiplication,

Fractions

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