Add 30/56 and 80/40
1st number: 30/56, 2nd number: 2 0/40
30/56 + 80/40 is 71/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 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 40 × 7 = 280,
80/40 = 80 × 7/40 × 7 = 560/280 - Add the two like fractions:
150/280 + 560/280 = 150 + 560/280 = 710/280 - 710/280 simplified gives 71/28
- So, 30/56 + 80/40 = 71/28
In mixed form: 215/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/56+80/40 90/56+80/40