Subtract 81/15 from 18/14
1st number: 1 4/14, 2nd number: 5 6/15
18/14 - 81/15 is -144/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 14 × 15 = 210,
18/14 = 18 × 15/14 × 15 = 270/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
81/15 = 81 × 14/15 × 14 = 1134/210 - Subtract the two like fractions:
270/210 - 1134/210 = 270 - 1134/210 = -864/210 - After reducing the fraction, the answer is -144/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/14-81/15 18/28-81/15 18/14-81/30 54/14-81/15 18/42-81/15 18/14-81/45 90/14-81/15 18/70-81/15 18/14-81/75 18/98-81/15