Add 18/7 and 28/40
1st number: 2 4/7, 2nd number: 28/40
18/7 + 28/40 is 229/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
18/7 = 18 × 40/7 × 40 = 720/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
28/40 = 28 × 7/40 × 7 = 196/280 - Add the two like fractions:
720/280 + 196/280 = 720 + 196/280 = 916/280 - 916/280 simplified gives 229/70
- So, 18/7 + 28/40 = 229/70
In mixed form: 319/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7+28/40 18/7+56/40 18/14+28/40 18/7+28/80 54/7+28/40 18/7+84/40 18/21+28/40 90/7+28/40 18/35+28/40 18/49+28/40