Subtract 12/45 from 15/75
15/75 - 12/45 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
15/75 = 15 × 3/75 × 3 = 45/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
12/45 = 12 × 5/45 × 5 = 60/225 - Subtract the two like fractions:
45/225 - 60/225 = 45 - 60/225 = -15/225 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/75-12/45 15/75-24/45 15/75-12/90 45/75-12/45 15/75-36/45 15/75-60/45 15/75-84/45