Subtract 14/21 from 12/15
12/15 - 14/21 is 2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
12/15 = 12 × 7/15 × 7 = 84/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
14/21 = 14 × 5/21 × 5 = 70/105 - Subtract the two like fractions:
84/105 - 70/105 = 84 - 70/105 = 14/105 - After reducing the fraction, the answer is 2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15-14/21 12/15-28/21 12/30-14/21 12/15-14/42 36/15-14/21 12/15-42/21 12/45-14/21 12/15-14/63 60/15-14/21 12/15-70/21 12/75-14/21 84/15-14/21 12/15-98/21