Add 6/5 and 18/21
1st number: 1 1/5, 2nd number: 18/21
6/5 + 18/21 is 72/35.
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,
6/5 = 6 × 21/5 × 21 = 126/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
18/21 = 18 × 5/21 × 5 = 90/105 - Add the two like fractions:
126/105 + 90/105 = 126 + 90/105 = 216/105 - 216/105 simplified gives 72/35
- So, 6/5 + 18/21 = 72/35
In mixed form: 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/5+18/21 6/5+36/21 6/10+18/21 6/5+18/42 18/5+18/21 6/5+54/21 6/15+18/21 6/5+18/63 30/5+18/21 6/5+90/21 6/25+18/21 42/5+18/21 6/35+18/21