Subtract 3/21 from 80/5
1st number: 16 0/5, 2nd number: 3/21
80/5 - 3/21 is 111/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
80/5 = 80 × 21/5 × 21 = 1680/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
3/21 = 3 × 5/21 × 5 = 15/105 - Subtract the two like fractions:
1680/105 - 15/105 = 1680 - 15/105 = 1665/105 - After reducing the fraction, the answer is 111/7
- In mixed form: 156/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/5-6/21 80/10-3/21 80/5-3/42 80/5-9/21 80/15-3/21 80/5-3/63 80/5-15/21 80/25-3/21 80/35-3/21