Add 27/30 and 2/21
27/30 + 2/21 is 209/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
2/21 = 2 × 10/21 × 10 = 20/210 - Add the two like fractions:
189/210 + 20/210 = 189 + 20/210 = 209/210 - So, 27/30 + 2/21 = 209/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30+2/21 27/30+4/21 27/60+2/21 27/30+2/42 81/30+2/21 27/30+6/21 27/90+2/21 27/30+2/63 27/30+10/21 27/30+14/21