Subtract 5/8 from 21/27
21/27 - 5/8 is 11/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 8 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
5/8 = 5 × 27/8 × 27 = 135/216 - Subtract the two like fractions:
168/216 - 135/216 = 168 - 135/216 = 33/216 - After reducing the fraction, the answer is 11/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-5/8 21/27-10/8 21/54-5/8 21/27-5/16 63/27-5/8 21/27-15/8 21/81-5/8 21/27-5/24 21/27-25/8 21/27-5/40 21/27-35/8 21/27-5/56