Add 4/21 and 84/70
1st number: 4/21, 2nd number: 1 14/70
4/21 + 84/70 is 146/105.
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,
4/21 = 4 × 10/21 × 10 = 40/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
84/70 = 84 × 3/70 × 3 = 252/210 - Add the two like fractions:
40/210 + 252/210 = 40 + 252/210 = 292/210 - 292/210 simplified gives 146/105
- So, 4/21 + 84/70 = 146/105
In mixed form: 141/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+84/70 4/42+84/70 12/21+84/70 4/63+84/70 20/21+84/70 28/21+84/70