Add 1/2 and 21/70
1/2 + 21/70 is 4/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 2 × 35 = 70,
1/2 = 1 × 35/2 × 35 = 35/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Add the two like fractions:
35/70 + 21/70 = 35 + 21/70 = 56/70 - 56/70 simplified gives 4/5
- So, 1/2 + 21/70 = 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2+42/70 1/4+21/70 3/2+21/70 1/2+63/70 1/6+21/70 5/2+21/70 1/10+21/70 7/2+21/70 1/14+21/70