Add 27/45 and 2/21
27/45 + 2/21 is 73/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
27/45 = 27 × 7/45 × 7 = 189/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Add the two like fractions:
189/315 + 30/315 = 189 + 30/315 = 219/315 - 219/315 simplified gives 73/105
- So, 27/45 + 2/21 = 73/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/45+2/21 27/45+4/21 27/90+2/21 27/45+2/42 81/45+2/21 27/45+6/21 27/45+2/63 27/45+10/21 27/45+14/21