Add 30/56 and 42/70
30/56 + 42/70 is 159/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
30/56 = 30 × 5/56 × 5 = 150/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
42/70 = 42 × 4/70 × 4 = 168/280 - Add the two like fractions:
150/280 + 168/280 = 150 + 168/280 = 318/280 - 318/280 simplified gives 159/140
- So, 30/56 + 42/70 = 159/140
In mixed form: 119/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/56+42/70 30/56+84/70 90/56+42/70