Subtract 21/6 from 15/5
1st number: 3 0/5, 2nd number: 3 3/6
15/5 - 21/6 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 6 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 5 × 6 = 30,
15/5 = 15 × 6/5 × 6 = 90/30 - Likewise, for the 2nd fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Subtract the two like fractions:
90/30 - 105/30 = 90 - 105/30 = -15/30 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-21/6 15/5-42/6 15/10-21/6 15/5-21/12 45/5-21/6 15/5-63/6 15/5-21/18 75/5-21/6 15/25-21/6 15/5-21/30 15/35-21/6 15/5-21/42