Add 21/20 and 21/35
1st number: 1 1/20, 2nd number: 21/35
21/20 + 21/35 is 33/20.
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,
21/20 = 21 × 7/20 × 7 = 147/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140 - Add the two like fractions:
147/140 + 84/140 = 147 + 84/140 = 231/140 - 231/140 simplified gives 33/20
- So, 21/20 + 21/35 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+21/35 21/20+42/35 21/40+21/35 21/20+21/70 63/20+21/35 21/20+63/35 21/60+21/35