Subtract 40/7 from 21/3
1st number: 7 0/3, 2nd number: 5 5/7
21/3 - 40/7 is 9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
21/3 = 21 × 7/3 × 7 = 147/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
40/7 = 40 × 3/7 × 3 = 120/21 - Subtract the two like fractions:
147/21 - 120/21 = 147 - 120/21 = 27/21 - After reducing the fraction, the answer is 9/7
- In mixed form: 12/7
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