Add 15/42 and 36/70
15/42 + 36/70 is 61/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
36/70 = 36 × 3/70 × 3 = 108/210 - Add the two like fractions:
75/210 + 108/210 = 75 + 108/210 = 183/210 - 183/210 simplified gives 61/70
- So, 15/42 + 36/70 = 61/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+36/70 15/42+72/70 15/84+36/70 45/42+36/70 75/42+36/70