Subtract 20/45 from 12/7
1st number: 1 5/7, 2nd number: 20/45
12/7 - 20/45 is 80/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
12/7 = 12 × 45/7 × 45 = 540/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Subtract the two like fractions:
540/315 - 140/315 = 540 - 140/315 = 400/315 - After reducing the fraction, the answer is 80/63
- In mixed form: 117/63
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