Subtract 49/42 from 12/9
1st number: 1 3/9, 2nd number: 1 7/42
12/9 - 49/42 is 1/6.
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,
12/9 = 12 × 14/9 × 14 = 168/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
49/42 = 49 × 3/42 × 3 = 147/126 - Subtract the two like fractions:
168/126 - 147/126 = 168 - 147/126 = 21/126 - After reducing the fraction, the answer is 1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9-49/42 12/9-98/42 12/18-49/42 12/9-49/84 36/9-49/42 12/27-49/42 60/9-49/42 12/45-49/42 84/9-49/42 12/63-49/42