Add 21/2 and 70/54
1st number: 10 1/2, 2nd number: 1 16/54
21/2 + 70/54 is 637/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
21/2 = 21 × 27/2 × 27 = 567/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
70/54 = 70 × 1/54 × 1 = 70/54 - Add the two like fractions:
567/54 + 70/54 = 567 + 70/54 = 637/54 - So, 21/2 + 70/54 = 637/54
In mixed form: 1143/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+70/54 21/4+70/54 63/2+70/54 21/6+70/54 21/10+70/54 21/14+70/54