Subtract 2/8 from 30/18
1st number: 1 12/18, 2nd number: 2/8
30/18 - 2/8 is 17/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
2/8 = 2 × 9/8 × 9 = 18/72 - Subtract the two like fractions:
120/72 - 18/72 = 120 - 18/72 = 102/72 - After reducing the fraction, the answer is 17/12
- In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-2/8 30/18-4/8 30/36-2/8 30/18-2/16 90/18-2/8 30/18-6/8 30/54-2/8 30/18-2/24 30/18-10/8 30/90-2/8 30/18-2/40 30/18-14/8 30/18-2/56