Add 27/90 and 6/21
27/90 + 6/21 is 41/70.
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,
6/21 = 6 × 30/21 × 30 = 180/630 - Add the two like fractions:
189/630 + 180/630 = 189 + 180/630 = 369/630 - 369/630 simplified gives 41/70
- So, 27/90 + 6/21 = 41/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+6/21 27/90+12/21 27/90+6/42 81/90+6/21 27/90+18/21 27/90+6/63 27/90+30/21 27/90+42/21