Add 7/90 and 24/21
1st number: 7/90, 2nd number: 1 3/21
7/90 + 24/21 is 769/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
24/21 = 24 × 30/21 × 30 = 720/630 - Add the two like fractions:
49/630 + 720/630 = 49 + 720/630 = 769/630 - So, 7/90 + 24/21 = 769/630
In mixed form: 1139/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+24/21 7/90+48/21 7/90+24/42 21/90+24/21 7/90+72/21 7/90+24/63 35/90+24/21 49/90+24/21