Subtract 12/18 from 20/8
1st number: 2 4/8, 2nd number: 12/18
20/8 - 12/18 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,
20/8 = 20 × 9/8 × 9 = 180/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
12/18 = 12 × 4/18 × 4 = 48/72 - Subtract the two like fractions:
180/72 - 48/72 = 180 - 48/72 = 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: 40/8-12/18 20/8-24/18 20/16-12/18 20/8-12/36 60/8-12/18 20/8-36/18 20/24-12/18 20/8-12/54 20/8-60/18 20/40-12/18 20/8-12/90 20/8-84/18 20/56-12/18