Add 84/21 and 54/70
1st number: 4 0/21, 2nd number: 54/70
84/21 + 54/70 is 167/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
84/21 = 84 × 10/21 × 10 = 840/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
54/70 = 54 × 3/70 × 3 = 162/210 - Add the two like fractions:
840/210 + 162/210 = 840 + 162/210 = 1002/210 - 1002/210 simplified gives 167/35
- So, 84/21 + 54/70 = 167/35
In mixed form: 427/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+54/70 84/63+54/70