Add 70/45 and 28/56
1st number: 1 25/45, 2nd number: 28/56
70/45 + 28/56 is 37/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 45 × 56 = 2520,
70/45 = 70 × 56/45 × 56 = 3920/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
28/56 = 28 × 45/56 × 45 = 1260/2520 - Add the two like fractions:
3920/2520 + 1260/2520 = 3920 + 1260/2520 = 5180/2520 - 5180/2520 simplified gives 37/18
- So, 70/45 + 28/56 = 37/18
In mixed form: 21/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+28/56 70/45+84/56