Add 70/15 and 42/56
1st number: 4 10/15, 2nd number: 42/56
70/15 + 42/56 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
70/15 = 70 × 56/15 × 56 = 3920/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
42/56 = 42 × 15/56 × 15 = 630/840 - Add the two like fractions:
3920/840 + 630/840 = 3920 + 630/840 = 4550/840 - 4550/840 simplified gives 65/12
- So, 70/15 + 42/56 = 65/12
In mixed form: 55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/15+84/56 70/30+42/56 70/45+42/56 70/75+42/56