Add 1/20 and 21/35
1/20 + 21/35 is 13/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
1/20 = 1 × 7/20 × 7 = 7/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140 - Add the two like fractions:
7/140 + 84/140 = 7 + 84/140 = 91/140 - 91/140 simplified gives 13/20
- So, 1/20 + 21/35 = 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20+21/35 1/20+42/35 1/40+21/35 1/20+21/70 3/20+21/35 1/20+63/35 1/60+21/35 5/20+21/35 7/20+21/35