Subtract 12/9 from 27/7
1st number: 3 6/7, 2nd number: 1 3/9
27/7 - 12/9 is 53/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
27/7 = 27 × 9/7 × 9 = 243/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Subtract the two like fractions:
243/63 - 84/63 = 243 - 84/63 = 159/63 - After reducing the fraction, the answer is 53/21
- In mixed form: 211/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/7-12/9 27/7-24/9 27/14-12/9 27/7-12/18 81/7-12/9 27/7-36/9 27/21-12/9 27/7-12/27 27/7-60/9 27/35-12/9 27/7-12/45 27/7-84/9 27/49-12/9 27/7-12/63