Subtract 12/15 from 45/30
1st number: 1 15/30, 2nd number: 12/15
45/30 - 12/15 is 7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
45/30 = 45 × 1/30 × 1 = 45/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
12/15 = 12 × 2/15 × 2 = 24/30 - Subtract the two like fractions:
45/30 - 24/30 = 45 - 24/30 = 21/30 - After reducing the fraction, the answer is 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-12/15 45/30-24/15 45/60-12/15 45/30-12/30 45/30-36/15 45/90-12/15 45/30-12/45 45/30-60/15 45/30-12/75 45/30-84/15