Add 1/8 and 21/70
1/8 + 21/70 is 17/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
1/8 = 1 × 35/8 × 35 = 35/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
21/70 = 21 × 4/70 × 4 = 84/280 - Add the two like fractions:
35/280 + 84/280 = 35 + 84/280 = 119/280 - 119/280 simplified gives 17/40
- So, 1/8 + 21/70 = 17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/8+21/70 1/8+42/70 1/16+21/70 3/8+21/70 1/8+63/70 1/24+21/70 5/8+21/70 1/40+21/70 7/8+21/70 1/56+21/70