Subtract 20/8 from 27/28
1st number: 27/28, 2nd number: 2 4/8
27/28 - 20/8 is -43/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
27/28 = 27 × 2/28 × 2 = 54/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Subtract the two like fractions:
54/56 - 140/56 = 54 - 140/56 = -86/56 - After reducing the fraction, the answer is -43/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/28-20/8 27/28-40/8 27/56-20/8 27/28-20/16 81/28-20/8 27/28-60/8 27/84-20/8 27/28-20/24 27/28-20/40 27/28-20/56