Add 90/15 and 21/49
1st number: 6 0/15, 2nd number: 21/49
90/15 + 21/49 is 45/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 49 is 735
Next, find the equivalent fraction of both fractional numbers with denominator 735 - For the 1st fraction, since 15 × 49 = 735,
90/15 = 90 × 49/15 × 49 = 4410/735 - Likewise, for the 2nd fraction, since 49 × 15 = 735,
21/49 = 21 × 15/49 × 15 = 315/735 - Add the two like fractions:
4410/735 + 315/735 = 4410 + 315/735 = 4725/735 - 4725/735 simplified gives 45/7
- So, 90/15 + 21/49 = 45/7
In mixed form: 63/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+42/49 90/30+21/49 90/15+21/98 90/15+63/49 90/45+21/49 90/75+21/49