Subtract 75/9 from 15/7
1st number: 2 1/7, 2nd number: 8 3/9
15/7 - 75/9 is -130/21.
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,
15/7 = 15 × 9/7 × 9 = 135/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
75/9 = 75 × 7/9 × 7 = 525/63 - Subtract the two like fractions:
135/63 - 525/63 = 135 - 525/63 = -390/63 - After reducing the fraction, the answer is -130/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-75/9 15/14-75/9 15/7-75/18 45/7-75/9 15/21-75/9 15/7-75/27 75/7-75/9 15/35-75/9 15/7-75/45 15/49-75/9 15/7-75/63