Add 18/70 and 36/42
18/70 + 36/42 is 39/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
36/42 = 36 × 5/42 × 5 = 180/210 - Add the two like fractions:
54/210 + 180/210 = 54 + 180/210 = 234/210 - 234/210 simplified gives 39/35
- So, 18/70 + 36/42 = 39/35
In mixed form: 14/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+36/42 18/70+72/42 18/70+36/84 54/70+36/42 90/70+36/42