Subtract 5/7 from 80/42
1st number: 1 38/42, 2nd number: 5/7
80/42 - 5/7 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
80/42 = 80 × 1/42 × 1 = 80/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
5/7 = 5 × 6/7 × 6 = 30/42 - Subtract the two like fractions:
80/42 - 30/42 = 80 - 30/42 = 50/42 - After reducing the fraction, the answer is 25/21
- In mixed form: 14/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-10/7 80/84-5/7 80/42-5/14 80/42-15/7 80/42-5/21 80/42-25/7 80/42-5/35 80/42-35/7 80/42-5/49