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Fractions calculation：
Enter the fractions calculation formula directly and click the "Next" button to get the calculation answer.
It does not support mathematical functions (including trigonometric functions) and can only calculate the addition, subtraction, multiplication and division of two fractions. The fraction line is indicated by "/".
Enter the fractions calculation formula directly and click the "Next" button to get the calculation answer.
It does not support mathematical functions (including trigonometric functions) and can only calculate the addition, subtraction, multiplication and division of two fractions. The fraction line is indicated by "/".
Current location：Mathematical operation > History of fraction calculation > Answer
Overview: 1 questions will be solved this time.Among them
☆1 fraction calculations
[ 1/1 Fraction calculation ]
Question type: Fractional subtraction
Original question: 3/21-2/24
Solution:
3 21 | － | 2 24 |
| = | 1 7 | - | 2 24 |
Reduce the subtractor by 2
| = | 1 7 | - | 1 12 |
| = | 1 7 | - | 1 12 |
Divide the least common multiple 84 by the denominator 7 of the minuend to get 12
Multiply the numerator 1 and denominator 7 of the subtracted number by 12
Then divide the least common multiple 84 by the denominator 12 of the subtraction to get 7
Multiply the subtracted numerator 1 and denominator 12 by 7 at the same time
| = | 12 84 | － | 7 84 |
| = | 5 84 |