Subtract 81/6 from 15/20
1st number: 15/20, 2nd number: 13 3/6
15/20 - 81/6 is -51/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 6 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Likewise, for the 2nd fraction, since 6 × 10 = 60,
81/6 = 81 × 10/6 × 10 = 810/60 - Subtract the two like fractions:
45/60 - 810/60 = 45 - 810/60 = -765/60 - After reducing the fraction, the answer is -51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-81/6 15/40-81/6 15/20-81/12 45/20-81/6 15/60-81/6 15/20-81/18 75/20-81/6 15/20-81/30 15/20-81/42