Subtract 3/9 from 30/8
1st number: 3 6/8, 2nd number: 3/9
30/8 - 3/9 is 41/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
30/8 = 30 × 9/8 × 9 = 270/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
3/9 = 3 × 8/9 × 8 = 24/72 - Subtract the two like fractions:
270/72 - 24/72 = 270 - 24/72 = 246/72 - After reducing the fraction, the answer is 41/12
- In mixed form: 35/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-3/9 30/8-6/9 30/16-3/9 30/8-3/18 90/8-3/9 30/24-3/9 30/8-3/27 30/8-15/9 30/40-3/9 30/8-3/45 30/8-21/9 30/56-3/9 30/8-3/63