Subtract 1/7 from 12/9
1st number: 1 3/9, 2nd number: 1/7
12/9 - 1/7 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
1/7 = 1 × 9/7 × 9 = 9/63 - Subtract the two like fractions:
84/63 - 9/63 = 84 - 9/63 = 75/63 - 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: 24/9-1/7 12/9-2/7 12/18-1/7 12/9-1/14 36/9-1/7 12/9-3/7 12/27-1/7 12/9-1/21 60/9-1/7 12/9-5/7 12/45-1/7 12/9-1/35 84/9-1/7 12/63-1/7 12/9-1/49