Subtract 21/7 from 27/5
1st number: 5 2/5, 2nd number: 3 0/7
27/5 - 21/7 is 12/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
27/5 = 27 × 7/5 × 7 = 189/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
21/7 = 21 × 5/7 × 5 = 105/35 - Subtract the two like fractions:
189/35 - 105/35 = 189 - 105/35 = 84/35 - After reducing the fraction, the answer is 12/5
- In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/5-21/7 27/5-42/7 27/10-21/7 27/5-21/14 81/5-21/7 27/5-63/7 27/15-21/7 27/25-21/7 27/5-21/35 27/35-21/7 27/5-21/49