Subtract 4/54 from 70/21
1st number: 3 7/21, 2nd number: 4/54
70/21 - 4/54 is 88/27.
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,
70/21 = 70 × 18/21 × 18 = 1260/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
4/54 = 4 × 7/54 × 7 = 28/378 - Subtract the two like fractions:
1260/378 - 28/378 = 1260 - 28/378 = 1232/378 - After reducing the fraction, the answer is 88/27
- In mixed form: 37/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-8/54 70/42-4/54 70/21-12/54 70/63-4/54 70/21-20/54 70/21-28/54