Add 70/21 and 24/54
1st number: 3 7/21, 2nd number: 24/54
70/21 + 24/54 is 34/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
70/21 = 70 × 18/21 × 18 = 1260/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
24/54 = 24 × 7/54 × 7 = 168/378 - Add the two like fractions:
1260/378 + 168/378 = 1260 + 168/378 = 1428/378 - 1428/378 simplified gives 34/9
- So, 70/21 + 24/54 = 34/9
In mixed form: 37/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+48/54 70/42+24/54 70/21+72/54 70/63+24/54