Subtract 7/9 from 1/5
15 - 79 is -2645.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45 - For the 1st fraction, since 5 × 9 = 45,
15 = 1 × 95 × 9 = 945 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
79 = 7 × 59 × 5 = 3545 - Subtract the two fractions:
945 - 3545 = 9 - 3545 = -2645
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5-7/9 1/5-14/9 1/10-7/9 1/5-7/18 3/5-7/9 1/5-21/9 1/15-7/9 1/5-7/27 1/5-35/9 1/25-7/9 1/5-7/45 7/5-7/9 1/5-49/9 1/35-7/9 1/5-7/63