Add 28/27 and 21/70
1st number: 1 1/27, 2nd number: 21/70
28/27 + 21/70 is 361/270.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 27 × 70 = 1890,
28/27 = 28 × 70/27 × 70 = 1960/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Add the two like fractions:
1960/1890 + 567/1890 = 1960 + 567/1890 = 2527/1890 - 2527/1890 simplified gives 361/270
- So, 28/27 + 21/70 = 361/270
In mixed form: 191/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/27+21/70 28/27+42/70 28/54+21/70 84/27+21/70 28/27+63/70 28/81+21/70