Add 42/15 and 56/63
1st number: 2 12/15, 2nd number: 56/63
42/15 + 56/63 is 166/45.
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,
42/15 = 42 × 21/15 × 21 = 882/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
56/63 = 56 × 5/63 × 5 = 280/315 - Add the two like fractions:
882/315 + 280/315 = 882 + 280/315 = 1162/315 - 1162/315 simplified gives 166/45
- So, 42/15 + 56/63 = 166/45
In mixed form: 331/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+56/63 42/30+56/63 42/45+56/63 42/75+56/63