Subtract 7/40 from 21/3
1st number: 7 0/3, 2nd number: 7/40
21/3 - 7/40 is 273/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
21/3 = 21 × 40/3 × 40 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120 - Subtract the two like fractions:
840/120 - 21/120 = 840 - 21/120 = 819/120 - After reducing the fraction, the answer is 273/40
- In mixed form: 633/40
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