Add 9/15 and 98/21
1st number: 9/15, 2nd number: 4 14/21
9/15 + 98/21 is 79/15.
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,
98/21 = 98 × 5/21 × 5 = 490/105 - Add the two like fractions:
63/105 + 490/105 = 63 + 490/105 = 553/105 - 553/105 simplified gives 79/15
- So, 9/15 + 98/21 = 79/15
In mixed form: 54/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+98/21 9/30+98/21 9/15+98/42 27/15+98/21 9/45+98/21 9/15+98/63 45/15+98/21 9/75+98/21 63/15+98/21