Subtract 16/56 from 20/12
1st number: 1 8/12, 2nd number: 16/56
20/12 - 16/56 is 29/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 12 × 14 = 168,
20/12 = 20 × 14/12 × 14 = 280/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
16/56 = 16 × 3/56 × 3 = 48/168 - Subtract the two like fractions:
280/168 - 48/168 = 280 - 48/168 = 232/168 - After reducing the fraction, the answer is 29/21
- In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12-16/56 20/12-32/56 20/24-16/56 60/12-16/56 20/12-48/56 20/36-16/56 20/12-80/56 20/60-16/56 20/84-16/56