Add 40/28 and 50/70
1st number: 1 12/28, 2nd number: 50/70
40/28 + 50/70 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
40/28 = 40 × 5/28 × 5 = 200/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
50/70 = 50 × 2/70 × 2 = 100/140 - Add the two like fractions:
200/140 + 100/140 = 200 + 100/140 = 300/140 - 300/140 simplified gives 15/7
- So, 40/28 + 50/70 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+50/70 40/56+50/70 40/84+50/70