Subtract 21/27 from 12/35
12/35 - 21/27 is -137/315.
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,
12/35 = 12 × 27/35 × 27 = 324/945 - Likewise, for the 2nd fraction, since 27 × 35 = 945,
21/27 = 21 × 35/27 × 35 = 735/945 - Subtract the two like fractions:
324/945 - 735/945 = 324 - 735/945 = -411/945 - After reducing the fraction, the answer is -137/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/35-21/27 12/35-42/27 12/70-21/27 12/35-21/54 36/35-21/27 12/35-63/27 12/35-21/81 60/35-21/27 84/35-21/27