Subtract 27/14 from 21/45
1st number: 21/45, 2nd number: 1 13/14
21/45 - 27/14 is -307/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
21/45 = 21 × 14/45 × 14 = 294/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
27/14 = 27 × 45/14 × 45 = 1215/630 - Subtract the two like fractions:
294/630 - 1215/630 = 294 - 1215/630 = -921/630 - After reducing the fraction, the answer is -307/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45-27/14 21/45-54/14 21/90-27/14 21/45-27/28 63/45-27/14 21/45-81/14 21/45-27/42 21/45-27/70 21/45-27/98