Subtract 40/7 from 21/2
1st number: 10 1/2, 2nd number: 5 5/7
21/2 - 40/7 is 67/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
21/2 = 21 × 7/2 × 7 = 147/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
40/7 = 40 × 2/7 × 2 = 80/14 - Subtract the two like fractions:
147/14 - 80/14 = 147 - 80/14 = 67/14 - In mixed form: 411/14
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