Subtract 49/56 from 80/42
1st number: 1 38/42, 2nd number: 49/56
80/42 - 49/56 is 173/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
80/42 = 80 × 4/42 × 4 = 320/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
49/56 = 49 × 3/56 × 3 = 147/168 - Subtract the two like fractions:
320/168 - 147/168 = 320 - 147/168 = 173/168 - In mixed form: 15/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-98/56 80/84-49/56