Subtract 40/3 from 21/30
1st number: 21/30, 2nd number: 13 1/3
21/30 - 40/3 is -379/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 3 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 3 × 10 = 30,
40/3 = 40 × 10/3 × 10 = 400/30 - Subtract the two like fractions:
21/30 - 400/30 = 21 - 400/30 = -379/30
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