Subtract 15/3 from 30/28
1st number: 1 2/28, 2nd number: 5 0/3
30/28 - 15/3 is -55/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 3 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Likewise, for the 2nd fraction, since 3 × 28 = 84,
15/3 = 15 × 28/3 × 28 = 420/84 - Subtract the two like fractions:
90/84 - 420/84 = 90 - 420/84 = -330/84 - After reducing the fraction, the answer is -55/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-15/3 30/28-30/3 30/56-15/3 30/28-15/6 90/28-15/3 30/28-45/3 30/84-15/3 30/28-15/9 30/28-75/3 30/28-15/21