Subtract 21/27 from 20/8
1st number: 2 4/8, 2nd number: 21/27
20/8 - 21/27 is 31/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 8 × 27 = 216,
20/8 = 20 × 27/8 × 27 = 540/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Subtract the two like fractions:
540/216 - 168/216 = 540 - 168/216 = 372/216 - After reducing the fraction, the answer is 31/18
- In mixed form: 113/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-21/27 20/8-42/27 20/16-21/27 20/8-21/54 60/8-21/27 20/8-63/27 20/24-21/27 20/8-21/81 20/40-21/27 20/56-21/27