Subtract 81/15 from 6/4
1st number: 1 2/4, 2nd number: 5 6/15
6/4 - 81/15 is -39/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
6/4 = 6 × 15/4 × 15 = 90/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
81/15 = 81 × 4/15 × 4 = 324/60 - Subtract the two like fractions:
90/60 - 324/60 = 90 - 324/60 = -234/60 - After reducing the fraction, the answer is -39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/4-81/15 6/8-81/15 6/4-81/30 18/4-81/15 6/12-81/15 6/4-81/45 30/4-81/15 6/20-81/15 6/4-81/75 42/4-81/15 6/28-81/15