Add 70/84 and 50/21
1st number: 70/84, 2nd number: 2 8/21
70/84 + 50/21 is 45/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
70/84 = 70 × 1/84 × 1 = 70/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
50/21 = 50 × 4/21 × 4 = 200/84 - Add the two like fractions:
70/84 + 200/84 = 70 + 200/84 = 270/84 - 270/84 simplified gives 45/14
- So, 70/84 + 50/21 = 45/14
In mixed form: 33/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+50/42 70/84+50/63