Subtract 7/9 from 80/42
1st number: 1 38/42, 2nd number: 7/9
80/42 - 7/9 is 71/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
7/9 = 7 × 14/9 × 14 = 98/126 - Subtract the two like fractions:
240/126 - 98/126 = 240 - 98/126 = 142/126 - After reducing the fraction, the answer is 71/63
- In mixed form: 18/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-14/9 80/84-7/9 80/42-7/18 80/42-21/9 80/42-7/27 80/42-35/9 80/42-7/45 80/42-49/9 80/42-7/63