Add 70/21 and 3/27
1st number: 3 7/21, 2nd number: 3/27
70/21 + 3/27 is 31/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
70/21 = 70 × 9/21 × 9 = 630/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
3/27 = 3 × 7/27 × 7 = 21/189 - Add the two like fractions:
630/189 + 21/189 = 630 + 21/189 = 651/189 - 651/189 simplified gives 31/9
- So, 70/21 + 3/27 = 31/9
In mixed form: 34/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+6/27 70/42+3/27 70/21+3/54 70/21+9/27 70/63+3/27 70/21+3/81 70/21+15/27 70/21+21/27