Add 1/15 and 63/42
1st number: 1/15, 2nd number: 1 21/42
1/15 + 63/42 is 47/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
1/15 = 1 × 14/15 × 14 = 14/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
63/42 = 63 × 5/42 × 5 = 315/210 - Add the two like fractions:
14/210 + 315/210 = 14 + 315/210 = 329/210 - 329/210 simplified gives 47/30
- So, 1/15 + 63/42 = 47/30
In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15+63/42 1/30+63/42 1/15+63/84 3/15+63/42 1/45+63/42 5/15+63/42 1/75+63/42 7/15+63/42