Subtract 18/7 from 15/5
1st number: 3 0/5, 2nd number: 2 4/7
15/5 - 18/7 is 3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
15/5 = 15 × 7/5 × 7 = 105/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
18/7 = 18 × 5/7 × 5 = 90/35 - Subtract the two like fractions:
105/35 - 90/35 = 105 - 90/35 = 15/35 - After reducing the fraction, the answer is 3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-18/7 15/5-36/7 15/10-18/7 15/5-18/14 45/5-18/7 15/5-54/7 15/5-18/21 75/5-18/7 15/5-90/7 15/25-18/7 15/5-18/35 15/35-18/7 15/5-18/49