Subtract 12/14 from 21/30
21/30 - 12/14 is -11/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 14 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Likewise, for the 2nd fraction, since 14 × 15 = 210,
12/14 = 12 × 15/14 × 15 = 180/210 - Subtract the two like fractions:
147/210 - 180/210 = 147 - 180/210 = -33/210 - After reducing the fraction, the answer is -11/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-12/14 21/30-24/14 21/60-12/14 21/30-12/28 63/30-12/14 21/30-36/14 21/90-12/14 21/30-12/42 21/30-60/14 21/30-12/70 21/30-84/14 21/30-12/98