Add 4/84 and 70/15
1st number: 4/84, 2nd number: 4 10/15
4/84 + 70/15 is 33/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
70/15 = 70 × 28/15 × 28 = 1960/420 - Add the two like fractions:
20/420 + 1960/420 = 20 + 1960/420 = 1980/420 - 1980/420 simplified gives 33/7
- So, 4/84 + 70/15 = 33/7
In mixed form: 45/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84+70/15 4/84+70/30 12/84+70/15 4/84+70/45 20/84+70/15 4/84+70/75 28/84+70/15