Subtract 12/54 from 35/21
1st number: 1 14/21, 2nd number: 12/54
35/21 - 12/54 is 13/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
35/21 = 35 × 18/21 × 18 = 630/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
12/54 = 12 × 7/54 × 7 = 84/378 - Subtract the two like fractions:
630/378 - 84/378 = 630 - 84/378 = 546/378 - After reducing the fraction, the answer is 13/9
- In mixed form: 14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-12/54 35/21-24/54 35/42-12/54 35/21-36/54 35/63-12/54 35/21-60/54 35/21-84/54