Subtract 9/54 from 80/21
1st number: 3 17/21, 2nd number: 9/54
80/21 - 9/54 is 51/14.
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,
80/21 = 80 × 18/21 × 18 = 1440/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378 - Subtract the two like fractions:
1440/378 - 63/378 = 1440 - 63/378 = 1377/378 - After reducing the fraction, the answer is 51/14
- In mixed form: 39/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-18/54 80/42-9/54 80/21-27/54 80/63-9/54 80/21-45/54 80/21-63/54