Subtract 3/15 from 42/30
1st number: 1 12/30, 2nd number: 3/15
42/30 - 3/15 is 6/5.
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,
42/30 = 42 × 1/30 × 1 = 42/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
3/15 = 3 × 2/15 × 2 = 6/30 - Subtract the two like fractions:
42/30 - 6/30 = 42 - 6/30 = 36/30 - After reducing the fraction, the answer is 6/5
- In mixed form: 11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-3/15 42/30-6/15 42/60-3/15 42/30-3/30 42/30-9/15 42/90-3/15 42/30-3/45 42/30-3/75 42/30-21/15