Add 50/15 and 21/84
1st number: 3 5/15, 2nd number: 21/84
50/15 + 21/84 is 43/12.
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,
50/15 = 50 × 28/15 × 28 = 1400/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
1400/420 + 105/420 = 1400 + 105/420 = 1505/420 - 1505/420 simplified gives 43/12
- So, 50/15 + 21/84 = 43/12
In mixed form: 37/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/15+42/84 50/30+21/84 50/15+63/84 50/45+21/84 50/75+21/84