Subtract 10/28 from 12/20
12/20 - 10/28 is 17/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
10/28 = 10 × 5/28 × 5 = 50/140 - Subtract the two like fractions:
84/140 - 50/140 = 84 - 50/140 = 34/140 - After reducing the fraction, the answer is 17/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-10/28 12/20-20/28 12/40-10/28 12/20-10/56 36/20-10/28 12/20-30/28 12/60-10/28 12/20-10/84 60/20-10/28 12/20-50/28 84/20-10/28 12/20-70/28