Subtract 30/18 from 28/8
1st number: 3 4/8, 2nd number: 1 12/18
28/8 - 30/18 is 11/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
28/8 = 28 × 9/8 × 9 = 252/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Subtract the two like fractions:
252/72 - 120/72 = 252 - 120/72 = 132/72 - After reducing the fraction, the answer is 11/6
- In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/8-30/18 28/8-60/18 28/16-30/18 28/8-30/36 84/8-30/18 28/8-90/18 28/24-30/18 28/8-30/54 28/40-30/18 28/8-30/90 28/56-30/18