Add 84/42 and 5/70
1st number: 2 0/42, 2nd number: 5/70
84/42 + 5/70 is 29/14.
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,
84/42 = 84 × 5/42 × 5 = 420/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
5/70 = 5 × 3/70 × 3 = 15/210 - Add the two like fractions:
420/210 + 15/210 = 420 + 15/210 = 435/210 - 435/210 simplified gives 29/14
- So, 84/42 + 5/70 = 29/14
In mixed form: 21/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+10/70 84/42+15/70 84/42+25/70 84/42+35/70