Add 6/5 and 72/21
1st number: 1 1/5, 2nd number: 3 9/21
6/5 + 72/21 is 162/35.
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,
72/21 = 72 × 5/21 × 5 = 360/105 - Add the two like fractions:
126/105 + 360/105 = 126 + 360/105 = 486/105 - 486/105 simplified gives 162/35
- So, 6/5 + 72/21 = 162/35
In mixed form: 422/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/5+72/21 6/10+72/21 6/5+72/42 18/5+72/21 6/15+72/21 6/5+72/63 30/5+72/21 6/25+72/21 42/5+72/21 6/35+72/21