Add 12/28 and 56/80
12/28 + 56/80 is 79/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
12/28 = 12 × 20/28 × 20 = 240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
56/80 = 56 × 7/80 × 7 = 392/560 - Add the two like fractions:
240/560 + 392/560 = 240 + 392/560 = 632/560 - 632/560 simplified gives 79/70
- So, 12/28 + 56/80 = 79/70
In mixed form: 19/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28+56/80 12/56+56/80 36/28+56/80 12/84+56/80 60/28+56/80 84/28+56/80