Subtract 28/20 from 7/30
1st number: 7/30, 2nd number: 1 8/20
7/30 - 28/20 is -7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
7/30 = 7 × 2/30 × 2 = 14/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Subtract the two like fractions:
14/60 - 84/60 = 14 - 84/60 = -70/60 - After reducing the fraction, the answer is -7/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-28/20 7/30-56/20 7/60-28/20 7/30-28/40 21/30-28/20 7/30-84/20 7/90-28/20 7/30-28/60 35/30-28/20 49/30-28/20