Subtract 30/7 from 15/28
1st number: 15/28, 2nd number: 4 2/7
15/28 - 30/7 is -15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
15/28 = 15 × 1/28 × 1 = 15/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
30/7 = 30 × 4/7 × 4 = 120/28 - Subtract the two like fractions:
15/28 - 120/28 = 15 - 120/28 = -105/28 - After reducing the fraction, the answer is -15/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28-30/7 15/28-60/7 15/56-30/7 15/28-30/14 45/28-30/7 15/28-90/7 15/84-30/7 15/28-30/21 75/28-30/7 15/28-30/35 15/28-30/49