Add 90/15 and 21/98
1st number: 6 0/15, 2nd number: 21/98
90/15 + 21/98 is 87/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 98 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 15 × 98 = 1470,
90/15 = 90 × 98/15 × 98 = 8820/1470 - Likewise, for the 2nd fraction, since 98 × 15 = 1470,
21/98 = 21 × 15/98 × 15 = 315/1470 - Add the two like fractions:
8820/1470 + 315/1470 = 8820 + 315/1470 = 9135/1470 - 9135/1470 simplified gives 87/14
- So, 90/15 + 21/98 = 87/14
In mixed form: 63/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+42/98 90/30+21/98 90/15+63/98 90/45+21/98 90/75+21/98