Add 70/14 and 18/21
1st number: 5 0/14, 2nd number: 18/21
70/14 + 18/21 is 41/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
70/14 = 70 × 3/14 × 3 = 210/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Add the two like fractions:
210/42 + 36/42 = 210 + 36/42 = 246/42 - 246/42 simplified gives 41/7
- So, 70/14 + 18/21 = 41/7
In mixed form: 56/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/14+36/21 70/28+18/21 70/14+18/42 70/14+54/21 70/42+18/21 70/14+18/63 70/14+90/21 70/98+18/21