Add 20/27 and 28/70
20/27 + 28/70 is 154/135.
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,
20/27 = 20 × 70/27 × 70 = 1400/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
28/70 = 28 × 27/70 × 27 = 756/1890 - Add the two like fractions:
1400/1890 + 756/1890 = 1400 + 756/1890 = 2156/1890 - 2156/1890 simplified gives 154/135
- So, 20/27 + 28/70 = 154/135
In mixed form: 119/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27+28/70 20/27+56/70 20/54+28/70 60/27+28/70 20/27+84/70 20/81+28/70