Subtract 21/7 from 2/5
1st number: 2/5, 2nd number: 3 0/7
2/5 - 21/7 is -13/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
2/5 = 2 × 7/5 × 7 = 14/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
21/7 = 21 × 5/7 × 5 = 105/35 - Subtract the two like fractions:
14/35 - 105/35 = 14 - 105/35 = -91/35 - After reducing the fraction, the answer is -13/5
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