Subtract 30/10 from 20/7
1st number: 2 6/7, 2nd number: 3 0/10
20/7 - 30/10 is -1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
20/7 = 20 × 10/7 × 10 = 200/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
30/10 = 30 × 7/10 × 7 = 210/70 - Subtract the two like fractions:
200/70 - 210/70 = 200 - 210/70 = -10/70 - After reducing the fraction, the answer is -1/7
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