Subtract 2/21 from 15/3
1st number: 5 0/3, 2nd number: 2/21
15/3 - 2/21 is 103/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
15/3 = 15 × 7/3 × 7 = 105/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
2/21 = 2 × 1/21 × 1 = 2/21 - Subtract the two like fractions:
105/21 - 2/21 = 105 - 2/21 = 103/21 - In mixed form: 419/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/3-2/21 15/3-4/21 15/6-2/21 15/3-2/42 45/3-2/21 15/3-6/21 15/9-2/21 15/3-2/63 75/3-2/21 15/3-10/21 15/3-14/21 15/21-2/21