Add 18/15 and 70/63
1st number: 1 3/15, 2nd number: 1 7/63
18/15 + 70/63 is 104/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
18/15 = 18 × 21/15 × 21 = 378/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
70/63 = 70 × 5/63 × 5 = 350/315 - Add the two like fractions:
378/315 + 350/315 = 378 + 350/315 = 728/315 - 728/315 simplified gives 104/45
- So, 18/15 + 70/63 = 104/45
In mixed form: 214/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+70/63 18/30+70/63 54/15+70/63 18/45+70/63 90/15+70/63 18/75+70/63