Subtract 28/30 from 28/7
1st number: 4 0/7, 2nd number: 28/30
28/7 - 28/30 is 46/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
28/7 = 28 × 30/7 × 30 = 840/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Subtract the two like fractions:
840/210 - 196/210 = 840 - 196/210 = 644/210 - After reducing the fraction, the answer is 46/15
- In mixed form: 31/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-28/30 28/7-56/30 28/14-28/30 28/7-28/60 84/7-28/30 28/7-84/30 28/21-28/30 28/7-28/90 28/35-28/30 28/49-28/30