Add 70/4 and 21/5
1st number: 17 2/4, 2nd number: 4 1/5
70/4 + 21/5 is 217/10.
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,
70/4 = 70 × 5/4 × 5 = 350/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
21/5 = 21 × 4/5 × 4 = 84/20 - Add the two like fractions:
350/20 + 84/20 = 350 + 84/20 = 434/20 - 434/20 simplified gives 217/10
- So, 70/4 + 21/5 = 217/10
In mixed form: 217/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/4+42/5 70/8+21/5 70/4+21/10 70/4+63/5 70/12+21/5 70/4+21/15 70/20+21/5 70/4+21/25 70/28+21/5 70/4+21/35