Add 21/30 and 98/63
1st number: 21/30, 2nd number: 1 35/63
21/30 + 98/63 is 203/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
98/63 = 98 × 10/63 × 10 = 980/630 - Add the two like fractions:
441/630 + 980/630 = 441 + 980/630 = 1421/630 - 1421/630 simplified gives 203/90
- So, 21/30 + 98/63 = 203/90
In mixed form: 223/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+98/63 21/60+98/63 63/30+98/63 21/90+98/63