Subtract 24/27 from 21/35
21/35 - 24/27 is -13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 27 is 945
Next, find the equivalent fraction of both fractional numbers with denominator 945 - For the 1st fraction, since 35 × 27 = 945,
21/35 = 21 × 27/35 × 27 = 567/945 - Likewise, for the 2nd fraction, since 27 × 35 = 945,
24/27 = 24 × 35/27 × 35 = 840/945 - Subtract the two like fractions:
567/945 - 840/945 = 567 - 840/945 = -273/945 - After reducing the fraction, the answer is -13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-24/27 21/35-48/27 21/70-24/27 21/35-24/54 63/35-24/27 21/35-72/27 21/35-24/81