Add 70/63 and 10/21
1st number: 1 7/63, 2nd number: 10/21
70/63 + 10/21 is 100/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
10/21 = 10 × 3/21 × 3 = 30/63 - Add the two like fractions:
70/63 + 30/63 = 70 + 30/63 = 100/63 - So, 70/63 + 10/21 = 100/63
In mixed form: 137/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/63+20/21 70/63+10/42 70/63+30/21 70/63+10/63 70/63+50/21 70/63+70/21