Add 35/28 and 80/40
1st number: 1 7/28, 2nd number: 2 0/40
35/28 + 80/40 is 13/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
35/28 = 35 × 10/28 × 10 = 350/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
80/40 = 80 × 7/40 × 7 = 560/280 - Add the two like fractions:
350/280 + 560/280 = 350 + 560/280 = 910/280 - 910/280 simplified gives 13/4
- So, 35/28 + 80/40 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/28+80/40 35/56+80/40 35/84+80/40