Add 21/70 and 21/5
1st number: 21/70, 2nd number: 4 1/5
21/70 + 21/5 is 9/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 5 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 5 × 14 = 70,
21/5 = 21 × 14/5 × 14 = 294/70 - Add the two like fractions:
21/70 + 294/70 = 21 + 294/70 = 315/70 - 315/70 simplified gives 9/2
- So, 21/70 + 21/5 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+21/5 21/70+42/5 21/70+21/10 63/70+21/5 21/70+63/5 21/70+21/15 21/70+21/25 21/70+21/35