Subtract 15/18 from 7/5
1st number: 1 2/5, 2nd number: 15/18
7/5 - 15/18 is 17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
7/5 = 7 × 18/5 × 18 = 126/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
15/18 = 15 × 5/18 × 5 = 75/90 - Subtract the two like fractions:
126/90 - 75/90 = 126 - 75/90 = 51/90 - After reducing the fraction, the answer is 17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/5-15/18 7/5-30/18 7/10-15/18 7/5-15/36 21/5-15/18 7/5-45/18 7/15-15/18 7/5-15/54 35/5-15/18 7/5-75/18 7/25-15/18 7/5-15/90 49/5-15/18 7/35-15/18