Add 84/70 and 21/27
1st number: 1 14/70, 2nd number: 21/27
84/70 + 21/27 is 89/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
84/70 = 84 × 27/70 × 27 = 2268/1890 - Likewise, for the 2nd fraction, since 27 × 70 = 1890,
21/27 = 21 × 70/27 × 70 = 1470/1890 - Add the two like fractions:
2268/1890 + 1470/1890 = 2268 + 1470/1890 = 3738/1890 - 3738/1890 simplified gives 89/45
- So, 84/70 + 21/27 = 89/45
In mixed form: 144/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+42/27 84/70+21/54 84/70+63/27 84/70+21/81