Add 7/5 and 4/21
1st number: 1 2/5, 2nd number: 4/21
7/5 + 4/21 is 167/105.
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,
7/5 = 7 × 21/5 × 21 = 147/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Add the two like fractions:
147/105 + 20/105 = 147 + 20/105 = 167/105 - So, 7/5 + 4/21 = 167/105
In mixed form: 162/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/5+4/21 7/5+8/21 7/10+4/21 7/5+4/42 21/5+4/21 7/5+12/21 7/15+4/21 7/5+4/63 35/5+4/21 7/5+20/21 7/25+4/21 49/5+4/21 7/5+28/21 7/35+4/21