Add 18/70 and 42/20
1st number: 18/70, 2nd number: 2 2/20
18/70 + 42/20 is 33/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
18/70 = 18 × 2/70 × 2 = 36/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
36/140 + 294/140 = 36 + 294/140 = 330/140 - 330/140 simplified gives 33/14
- So, 18/70 + 42/20 = 33/14
In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+42/20 18/70+84/20 18/70+42/40 54/70+42/20 18/70+42/60 90/70+42/20