Add 15/5 and 2/21
1st number: 3 0/5, 2nd number: 2/21
15/5 + 2/21 is 65/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
15/5 = 15 × 21/5 × 21 = 315/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105 - Add the two like fractions:
315/105 + 10/105 = 315 + 10/105 = 325/105 - 325/105 simplified gives 65/21
- So, 15/5 + 2/21 = 65/21
In mixed form: 32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+2/21 15/5+4/21 15/10+2/21 15/5+2/42 45/5+2/21 15/5+6/21 15/5+2/63 75/5+2/21 15/5+10/21 15/25+2/21 15/5+14/21 15/35+2/21