Add 35/90 and 35/21
1st number: 35/90, 2nd number: 1 14/21
35/90 + 35/21 is 37/18.
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,
35/90 = 35 × 7/90 × 7 = 245/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
35/21 = 35 × 30/21 × 30 = 1050/630 - Add the two like fractions:
245/630 + 1050/630 = 245 + 1050/630 = 1295/630 - 1295/630 simplified gives 37/18
- So, 35/90 + 35/21 = 37/18
In mixed form: 21/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+35/21 35/90+70/21 35/90+35/42 35/90+35/63