Subtract 20/5 from 30/28
1st number: 1 2/28, 2nd number: 4 0/5
30/28 - 20/5 is -41/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
20/5 = 20 × 28/5 × 28 = 560/140 - Subtract the two like fractions:
150/140 - 560/140 = 150 - 560/140 = -410/140 - After reducing the fraction, the answer is -41/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-20/5 30/28-40/5 30/56-20/5 30/28-20/10 90/28-20/5 30/28-60/5 30/84-20/5 30/28-20/15 30/28-20/25 30/28-20/35