Add 50/21 and 98/90
1st number: 2 8/21, 2nd number: 1 8/90
50/21 + 98/90 is 1093/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
50/21 = 50 × 30/21 × 30 = 1500/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
98/90 = 98 × 7/90 × 7 = 686/630 - Add the two like fractions:
1500/630 + 686/630 = 1500 + 686/630 = 2186/630 - 2186/630 simplified gives 1093/315
- So, 50/21 + 98/90 = 1093/315
In mixed form: 3148/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+98/90 50/63+98/90