Subtract 12/18 from 15/75
15/75 - 12/18 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
15/75 = 15 × 6/75 × 6 = 90/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
12/18 = 12 × 25/18 × 25 = 300/450 - Subtract the two like fractions:
90/450 - 300/450 = 90 - 300/450 = -210/450 - After reducing the fraction, the answer is -7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75-12/18 15/75-24/18 15/75-12/36 45/75-12/18 15/75-36/18 15/75-12/54 15/75-60/18 15/75-12/90 15/75-84/18