Add 4/28 and 70/80
4/28 + 70/80 is 57/56.
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,
4/28 = 4 × 20/28 × 20 = 80/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Add the two like fractions:
80/560 + 490/560 = 80 + 490/560 = 570/560 - 570/560 simplified gives 57/56
- So, 4/28 + 70/80 = 57/56
In mixed form: 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28+70/80 4/56+70/80 12/28+70/80 4/84+70/80 20/28+70/80