Add 4/28 and 4/40
4/28 + 4/40 is 17/70.
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,
4/28 = 4 × 10/28 × 10 = 40/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
4/40 = 4 × 7/40 × 7 = 28/280 - Add the two like fractions:
40/280 + 28/280 = 40 + 28/280 = 68/280 - 68/280 simplified gives 17/70
- So, 4/28 + 4/40 = 17/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28+4/40 4/28+8/40 4/56+4/40 4/28+4/80 12/28+4/40 4/28+12/40 4/84+4/40 20/28+4/40 4/28+20/40 4/28+28/40