Add 20/15 and 30/63
1st number: 1 5/15, 2nd number: 30/63
20/15 + 30/63 is 38/21.
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,
20/15 = 20 × 21/15 × 21 = 420/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
30/63 = 30 × 5/63 × 5 = 150/315 - Add the two like fractions:
420/315 + 150/315 = 420 + 150/315 = 570/315 - 570/315 simplified gives 38/21
- So, 20/15 + 30/63 = 38/21
In mixed form: 117/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+30/63 20/15+60/63 20/30+30/63 60/15+30/63 20/15+90/63 20/45+30/63 20/75+30/63