Subtract 15/30 from 28/7
1st number: 4 0/7, 2nd number: 15/30
28/7 - 15/30 is 7/2.
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,
15/30 = 15 × 7/30 × 7 = 105/210 - Subtract the two like fractions:
840/210 - 105/210 = 840 - 105/210 = 735/210 - After reducing the fraction, the answer is 7/2
- In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-15/30 28/14-15/30 28/7-15/60 84/7-15/30 28/7-45/30 28/21-15/30 28/7-15/90 28/7-75/30 28/35-15/30 28/49-15/30