Add 27/90 and 35/21
1st number: 27/90, 2nd number: 1 14/21
27/90 + 35/21 is 59/30.
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,
27/90 = 27 × 7/90 × 7 = 189/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
35/21 = 35 × 30/21 × 30 = 1050/630 - Add the two like fractions:
189/630 + 1050/630 = 189 + 1050/630 = 1239/630 - 1239/630 simplified gives 59/30
- So, 27/90 + 35/21 = 59/30
In mixed form: 129/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+35/21 27/90+70/21 27/90+35/42 81/90+35/21 27/90+35/63