Subtract 21/27 from 6/45
6/45 - 21/27 is -29/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 45 × 3 = 135,
6/45 = 6 × 3/45 × 3 = 18/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Subtract the two like fractions:
18/135 - 105/135 = 18 - 105/135 = -87/135 - After reducing the fraction, the answer is -29/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/45-21/27 6/45-42/27 6/90-21/27 6/45-21/54 18/45-21/27 6/45-63/27 6/45-21/81 30/45-21/27 42/45-21/27