Add 81/42 and 36/10
1st number: 1 39/42, 2nd number: 3 6/10
81/42 + 36/10 is 387/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
36/10 = 36 × 21/10 × 21 = 756/210 - Add the two like fractions:
405/210 + 756/210 = 405 + 756/210 = 1161/210 - 1161/210 simplified gives 387/70
- So, 81/42 + 36/10 = 387/70
In mixed form: 537/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/42+72/10 81/84+36/10 81/42+36/20 81/42+36/30 81/42+36/50 81/42+36/70