You will need
  • Basic knowledge in mathematics.
Instruction
1
Suppose you have two fractions: 2/3 and 7/8. First find the least common dividend of the denominators of these fractions, and then both fractions to him. In our case, the least common divisible is the number 24, that's up to him and we allow the fraction.
2
To bring the first fraction to the lowest common delimma found, multiply the numerator of the first fraction to the quotient of this divisor by the numerator. In our case it will be: 24/3=8. That is the numerator of the first fraction must be multiplied by 8. Similarly we find the multiplier for the second fraction: 24/8=3. That is the numerator of the second fraction must be multiplied by 3.
3
Multiply the numerators of the fractions on received private. In the result, the fractions get a common denominator: 16/24 and 21/24.