Add 3/15 and 30/84
3/15 + 30/84 is 39/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
3/15 = 3 × 28/15 × 28 = 84/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420 - Add the two like fractions:
84/420 + 150/420 = 84 + 150/420 = 234/420 - 234/420 simplified gives 39/70
- So, 3/15 + 30/84 = 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15+30/84 3/15+60/84 3/30+30/84 9/15+30/84 3/15+90/84 3/45+30/84 3/75+30/84 21/15+30/84