Add 7/84 and 70/35
1st number: 7/84, 2nd number: 2 0/35
7/84 + 70/35 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
70/35 = 70 × 12/35 × 12 = 840/420 - Add the two like fractions:
35/420 + 840/420 = 35 + 840/420 = 875/420 - 875/420 simplified gives 25/12
- So, 7/84 + 70/35 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84+70/35 21/84+70/35 35/84+70/35 49/84+70/35