Subtract 80/42 from 54/15
1st number: 3 9/15, 2nd number: 1 38/42
54/15 - 80/42 is 178/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
54/15 = 54 × 14/15 × 14 = 756/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
756/210 - 400/210 = 756 - 400/210 = 356/210 - After reducing the fraction, the answer is 178/105
- In mixed form: 173/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30-80/42 54/15-80/84 54/45-80/42 54/75-80/42