Subtract 28/14 from 30/20
1st number: 1 10/20, 2nd number: 2 0/14
30/20 - 28/14 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
28/14 = 28 × 10/14 × 10 = 280/140 - Subtract the two like fractions:
210/140 - 280/140 = 210 - 280/140 = -70/140 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-28/14 30/20-56/14 30/40-28/14 90/20-28/14 30/20-84/14 30/60-28/14 30/20-28/42 30/20-28/70 30/20-28/98