Add 30/84 and 50/15
1st number: 30/84, 2nd number: 3 5/15
30/84 + 50/15 is 155/42.
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,
30/84 = 30 × 5/84 × 5 = 150/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
50/15 = 50 × 28/15 × 28 = 1400/420 - Add the two like fractions:
150/420 + 1400/420 = 150 + 1400/420 = 1550/420 - 1550/420 simplified gives 155/42
- So, 30/84 + 50/15 = 155/42
In mixed form: 329/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84+50/15 30/84+50/30 90/84+50/15 30/84+50/45 30/84+50/75