Add 28/4 and 70/5
1st number: 7 0/4, 2nd number: 14 0/5
28/4 + 70/5 is 21/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
28/4 = 28 × 5/4 × 5 = 140/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
70/5 = 70 × 4/5 × 4 = 280/20 - Add the two like fractions:
140/20 + 280/20 = 140 + 280/20 = 420/20 - 420/20 simplified gives 21/1
- So, 28/4 + 70/5 = 21/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4+70/5 28/8+70/5 28/4+70/10 84/4+70/5 28/12+70/5 28/4+70/15 28/20+70/5 28/4+70/25 28/4+70/35