Add 2/21 and 70/63
1st number: 2/21, 2nd number: 1 7/63
2/21 + 70/63 is 76/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
2/21 = 2 × 3/21 × 3 = 6/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Add the two like fractions:
6/63 + 70/63 = 6 + 70/63 = 76/63 - So, 2/21 + 70/63 = 76/63
In mixed form: 113/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+70/63 2/42+70/63 6/21+70/63 2/63+70/63 10/21+70/63 14/21+70/63