Subtract 6/7 from 30/8
1st number: 3 6/8, 2nd number: 6/7
30/8 - 6/7 is 81/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
30/8 = 30 × 7/8 × 7 = 210/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
6/7 = 6 × 8/7 × 8 = 48/56 - Subtract the two like fractions:
210/56 - 48/56 = 210 - 48/56 = 162/56 - After reducing the fraction, the answer is 81/28
- In mixed form: 225/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-6/7 30/8-12/7 30/16-6/7 30/8-6/14 90/8-6/7 30/8-18/7 30/24-6/7 30/8-6/21 30/8-30/7 30/40-6/7 30/8-6/35 30/8-42/7 30/56-6/7 30/8-6/49