Subtract 12/20 from 80/30
1st number: 2 20/30, 2nd number: 12/20
80/30 - 12/20 is 31/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
80/30 = 80 × 2/30 × 2 = 160/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
12/20 = 12 × 3/20 × 3 = 36/60 - Subtract the two like fractions:
160/60 - 36/60 = 160 - 36/60 = 124/60 - After reducing the fraction, the answer is 31/15
- In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-24/20 80/60-12/20 80/30-12/40 80/30-36/20 80/90-12/20 80/30-12/60 80/30-60/20 80/30-84/20