Subtract 80/42 from 27/9
1st number: 3 0/9, 2nd number: 1 38/42
27/9 - 80/42 is 23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
27/9 = 27 × 14/9 × 14 = 378/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
80/42 = 80 × 3/42 × 3 = 240/126 - Subtract the two like fractions:
378/126 - 240/126 = 378 - 240/126 = 138/126 - After reducing the fraction, the answer is 23/21
- In mixed form: 12/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/9-80/42 27/18-80/42 27/9-80/84 81/9-80/42 27/45-80/42 27/63-80/42