Subtract 5/10 from 21/27
21/27 - 5/10 is 5/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
5/10 = 5 × 27/10 × 27 = 135/270 - Subtract the two like fractions:
210/270 - 135/270 = 210 - 135/270 = 75/270 - After reducing the fraction, the answer is 5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-5/10 21/54-5/10 21/27-5/20 63/27-5/10 21/27-15/10 21/81-5/10 21/27-5/30 21/27-25/10 21/27-5/50 21/27-35/10 21/27-5/70