Add 27/20 and 21/70
1st number: 1 7/20, 2nd number: 21/70
27/20 + 21/70 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
27/20 = 27 × 7/20 × 7 = 189/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Add the two like fractions:
189/140 + 42/140 = 189 + 42/140 = 231/140 - 231/140 simplified gives 33/20
- So, 27/20 + 21/70 = 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: 54/20+21/70 27/20+42/70 27/40+21/70 81/20+21/70 27/20+63/70 27/60+21/70