Add 7/5 and 1/21
1st number: 1 2/5, 2nd number: 1/21
7/5 + 1/21 is 152/105.
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,
1/21 = 1 × 5/21 × 5 = 5/105 - Add the two like fractions:
147/105 + 5/105 = 147 + 5/105 = 152/105 - So, 7/5 + 1/21 = 152/105
In mixed form: 147/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/5+1/21 7/5+2/21 7/10+1/21 7/5+1/42 21/5+1/21 7/5+3/21 7/15+1/21 7/5+1/63 35/5+1/21 7/5+5/21 7/25+1/21 49/5+1/21 7/5+7/21 7/35+1/21