Subtract 27/7 from 15/9
1st number: 1 6/9, 2nd number: 3 6/7
15/9 - 27/7 is -46/21.
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,
15/9 = 15 × 7/9 × 7 = 105/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
27/7 = 27 × 9/7 × 9 = 243/63 - Subtract the two like fractions:
105/63 - 243/63 = 105 - 243/63 = -138/63 - After reducing the fraction, the answer is -46/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-27/7 15/9-54/7 15/18-27/7 15/9-27/14 45/9-27/7 15/9-81/7 15/27-27/7 15/9-27/21 75/9-27/7 15/45-27/7 15/9-27/35 15/63-27/7 15/9-27/49