Subtract 4/54 from 21/15
1st number: 1 6/15, 2nd number: 4/54
21/15 - 4/54 is 179/135.
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,
4/54 = 4 × 5/54 × 5 = 20/270 - Subtract the two like fractions:
378/270 - 20/270 = 378 - 20/270 = 358/270 - After reducing the fraction, the answer is 179/135
- In mixed form: 144/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-4/54 21/15-8/54 21/30-4/54 63/15-4/54 21/15-12/54 21/45-4/54 21/15-20/54 21/75-4/54 21/15-28/54