Subtract 15/54 from 21/15
1st number: 1 6/15, 2nd number: 15/54
21/15 - 15/54 is 101/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 15 × 18 = 270,
21/15 = 21 × 18/15 × 18 = 378/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
15/54 = 15 × 5/54 × 5 = 75/270 - Subtract the two like fractions:
378/270 - 75/270 = 378 - 75/270 = 303/270 - After reducing the fraction, the answer is 101/90
- In mixed form: 111/90
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