Add 9/15 and 45/21
1st number: 9/15, 2nd number: 2 3/21
9/15 + 45/21 is 96/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
9/15 = 9 × 7/15 × 7 = 63/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
45/21 = 45 × 5/21 × 5 = 225/105 - Add the two like fractions:
63/105 + 225/105 = 63 + 225/105 = 288/105 - 288/105 simplified gives 96/35
- So, 9/15 + 45/21 = 96/35
In mixed form: 226/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+45/21 9/15+90/21 9/30+45/21 9/15+45/42 27/15+45/21 9/45+45/21 9/15+45/63 45/15+45/21 9/75+45/21 63/15+45/21