Subtract 7/27 from 15/21
1521 - 727 is 86189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
1521 = 15 × 921 × 9 = 135189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
727 = 7 × 727 × 7 = 49189 - Subtract the two like fractions:
135189 - 49189 = 135 - 49189 = 86189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21-7/27 15/21-14/27 15/42-7/27 15/21-7/54 45/21-7/27 15/21-21/27 15/63-7/27 15/21-7/81 75/21-7/27 15/21-35/27 15/21-49/27