Subtract 18/28 from 6/30
6/30 - 18/28 is -31/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
6/30 = 6 × 14/30 × 14 = 84/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
18/28 = 18 × 15/28 × 15 = 270/420 - Subtract the two like fractions:
84/420 - 270/420 = 84 - 270/420 = -186/420 - After reducing the fraction, the answer is -31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/30-18/28 6/30-36/28 6/60-18/28 6/30-18/56 18/30-18/28 6/30-54/28 6/90-18/28 6/30-18/84 6/30-90/28 42/30-18/28