Add 21/98 and 45/30
1st number: 21/98, 2nd number: 1 15/30
21/98 + 45/30 is 12/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 30 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 98 × 15 = 1470,
21/98 = 21 × 15/98 × 15 = 315/1470 - Likewise, for the 2nd fraction, since 30 × 49 = 1470,
45/30 = 45 × 49/30 × 49 = 2205/1470 - Add the two like fractions:
315/1470 + 2205/1470 = 315 + 2205/1470 = 2520/1470 - 2520/1470 simplified gives 12/7
- So, 21/98 + 45/30 = 12/7
In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+45/30 21/98+90/30 21/98+45/60 63/98+45/30 21/98+45/90