The problem is to subtract two fractions: $\frac{12}{7} - \frac{2}{3}$. We need to find a common denominator, rewrite the fractions with the common denominator, and then perform the subtraction.

ArithmeticFractionsSubtractionCommon DenominatorArithmetic Operations
2025/5/11

1. Problem Description

The problem is to subtract two fractions: 12723\frac{12}{7} - \frac{2}{3}. We need to find a common denominator, rewrite the fractions with the common denominator, and then perform the subtraction.

2. Solution Steps

First, we need to find a common denominator for the fractions 127\frac{12}{7} and 23\frac{2}{3}. The least common multiple of 7 and 3 is
2

1. We rewrite the fractions with the common denominator of

2

1. To rewrite $\frac{12}{7}$ with a denominator of 21, we multiply both the numerator and the denominator by 3:

127=12×37×3=3621\frac{12}{7} = \frac{12 \times 3}{7 \times 3} = \frac{36}{21}
To rewrite 23\frac{2}{3} with a denominator of 21, we multiply both the numerator and the denominator by 7:
23=2×73×7=1421\frac{2}{3} = \frac{2 \times 7}{3 \times 7} = \frac{14}{21}
Now we can subtract the two fractions:
36211421=361421=2221\frac{36}{21} - \frac{14}{21} = \frac{36 - 14}{21} = \frac{22}{21}

3. Final Answer

12723=36211421=2221\frac{12}{7} - \frac{2}{3} = \frac{36}{21} - \frac{14}{21} = \frac{22}{21}

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