Add 15/63 and 20/15
1st number: 15/63, 2nd number: 1 5/15
15/63 + 20/15 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
15/63 = 15 × 5/63 × 5 = 75/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
20/15 = 20 × 21/15 × 21 = 420/315 - Add the two like fractions:
75/315 + 420/315 = 75 + 420/315 = 495/315 - 495/315 simplified gives 11/7
- So, 15/63 + 20/15 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63+20/15 15/63+40/15 15/63+20/30 45/63+20/15 15/63+60/15 15/63+20/45 75/63+20/15 15/63+20/75