Subtract 30/6 from 42/15
1st number: 2 12/15, 2nd number: 5 0/6
42/15 - 30/6 is -11/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 6 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Likewise, for the 2nd fraction, since 6 × 5 = 30,
30/6 = 30 × 5/6 × 5 = 150/30 - Subtract the two like fractions:
84/30 - 150/30 = 84 - 150/30 = -66/30 - After reducing the fraction, the answer is -11/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-30/6 42/15-60/6 42/30-30/6 42/15-30/12 42/15-90/6 42/45-30/6 42/15-30/18 42/75-30/6 42/15-30/42