Add 70/12 and 42/63
1st number: 5 10/12, 2nd number: 42/63
70/12 + 42/63 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
70/12 = 70 × 21/12 × 21 = 1470/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Add the two like fractions:
1470/252 + 168/252 = 1470 + 168/252 = 1638/252 - 1638/252 simplified gives 13/2
- So, 70/12 + 42/63 = 13/2
In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/12+84/63 70/24+42/63 70/36+42/63 70/60+42/63 70/84+42/63