Subtract 21/15 from 20/3
1st number: 6 2/3, 2nd number: 1 6/15
20/3 - 21/15 is 79/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 15 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 3 × 5 = 15,
20/3 = 20 × 5/3 × 5 = 100/15 - Likewise, for the 2nd fraction, since 15 × 1 = 15,
21/15 = 21 × 1/15 × 1 = 21/15 - Subtract the two like fractions:
100/15 - 21/15 = 100 - 21/15 = 79/15 - In mixed form: 54/15
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