Subtract 28/60 from 80/21
1st number: 3 17/21, 2nd number: 28/60
80/21 - 28/60 is 117/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
80/21 = 80 × 20/21 × 20 = 1600/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
28/60 = 28 × 7/60 × 7 = 196/420 - Subtract the two like fractions:
1600/420 - 196/420 = 1600 - 196/420 = 1404/420 - After reducing the fraction, the answer is 117/35
- In mixed form: 312/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-56/60 80/42-28/60 80/21-84/60 80/63-28/60