Add 28/56 and 30/80
28/56 + 30/80 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 56 × 10 = 560,
28/56 = 28 × 10/56 × 10 = 280/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
30/80 = 30 × 7/80 × 7 = 210/560 - Add the two like fractions:
280/560 + 210/560 = 280 + 210/560 = 490/560 - 490/560 simplified gives 7/8
- So, 28/56 + 30/80 = 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/56+60/80 84/56+30/80 28/56+90/80