Add 4/56 and 80/21
1st number: 4/56, 2nd number: 3 17/21
4/56 + 80/21 is 163/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
4/56 = 4 × 3/56 × 3 = 12/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
80/21 = 80 × 8/21 × 8 = 640/168 - Add the two like fractions:
12/168 + 640/168 = 12 + 640/168 = 652/168 - 652/168 simplified gives 163/42
- So, 4/56 + 80/21 = 163/42
In mixed form: 337/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/56+80/21 4/56+80/42 12/56+80/21 4/56+80/63 20/56+80/21 28/56+80/21