Subtract 25/15 from 12/18
1st number: 12/18, 2nd number: 1 10/15
12/18 - 25/15 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
25/15 = 25 × 6/15 × 6 = 150/90 - Subtract the two like fractions:
60/90 - 150/90 = 60 - 150/90 = -90/90 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18-25/15 12/18-50/15 12/36-25/15 12/18-25/30 36/18-25/15 12/18-75/15 12/54-25/15 12/18-25/45 60/18-25/15 12/90-25/15 12/18-25/75 84/18-25/15