Add 63/56 and 12/15
1st number: 1 7/56, 2nd number: 12/15
63/56 + 12/15 is 77/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 15 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 56 × 15 = 840,
63/56 = 63 × 15/56 × 15 = 945/840 - Likewise, for the 2nd fraction, since 15 × 56 = 840,
12/15 = 12 × 56/15 × 56 = 672/840 - Add the two like fractions:
945/840 + 672/840 = 945 + 672/840 = 1617/840 - 1617/840 simplified gives 77/40
- So, 63/56 + 12/15 = 77/40
In mixed form: 137/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/56+24/15 63/56+12/30 63/56+36/15 63/56+12/45 63/56+60/15 63/56+12/75 63/56+84/15