Add 4/21 and 70/28
1st number: 4/21, 2nd number: 2 14/28
4/21 + 70/28 is 113/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
70/28 = 70 × 3/28 × 3 = 210/84 - Add the two like fractions:
16/84 + 210/84 = 16 + 210/84 = 226/84 - 226/84 simplified gives 113/42
- So, 4/21 + 70/28 = 113/42
In mixed form: 229/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+70/28 4/42+70/28 4/21+70/56 12/21+70/28 4/63+70/28 4/21+70/84 20/21+70/28 28/21+70/28