Add 5/28 and 15/40
5/28 + 15/40 is 31/56.
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,
5/28 = 5 × 10/28 × 10 = 50/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Add the two like fractions:
50/280 + 105/280 = 50 + 105/280 = 155/280 - 155/280 simplified gives 31/56
- So, 5/28 + 15/40 = 31/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28+15/40 5/28+30/40 5/56+15/40 5/28+15/80 15/28+15/40 5/28+45/40 5/84+15/40 25/28+15/40 5/28+75/40 35/28+15/40