Subtract 18/3 from 28/30
1st number: 28/30, 2nd number: 6 0/3
28/30 - 18/3 is -76/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 3 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
28/30 = 28 × 1/30 × 1 = 28/30 - Likewise, for the 2nd fraction, since 3 × 10 = 30,
18/3 = 18 × 10/3 × 10 = 180/30 - Subtract the two like fractions:
28/30 - 180/30 = 28 - 180/30 = -152/30 - After reducing the fraction, the answer is -76/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-18/3 28/30-36/3 28/60-18/3 28/30-18/6 84/30-18/3 28/30-54/3 28/90-18/3 28/30-18/9 28/30-90/3 28/30-18/15 28/30-18/21