1, find the least common multiple of the denominator of the original fraction.

2. According to the basic properties of the score, change the original score into a score with this least common multiple as the denominator.

For example: 5/7 and 7/ 12.

1, first find the lowest common multiple of denominator 7 and 12.

Multiples of 7: 7, 14, 2 1, 28, 35, 42, 49, 56, 63, 70, 77, 84, 92.

/kloc-multiples of 0/2: 12, 24, 36, 48, 60, 72, 84, 96.

It is observed that the least common multiple of 7 and 12 is 84.

2. Turn 5/7 and 7/ 12 into fractions with denominator of 84.

5/7=(5× 12)/(7× 12)=60/84

7/ 12=(7×7)/( 12×7)=49/84

Therefore, the division of 5/7 and 7/ 12 results in 60/84 and 49/84.

Extended data:

The key to sharing

1, which respectively lists the divisors of each denominator;

2. Multiply the divisor of the denominator. If there is a common divisor, the result is the least common multiple of the denominator;

3. All the letters or factors based on letters should be taken;

4. The factor with the same letter or the power of the factor with the letter takes the largest exponent;

5. Multiply all the above formulas to get the simplest common denominator.

Note: The least common multiple of two or more integers is called their least common multiple. The least common multiple of integers a and b is marked as [a, b]. Similarly, the least common multiples of a, b and c are marked as [a, b, c], and the least common multiples of multiple integers also have the same marks.