Add 16/15 and 21/84
1st number: 1 1/15, 2nd number: 21/84
16/15 + 21/84 is 79/60.
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,
16/15 = 16 × 28/15 × 28 = 448/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
448/420 + 105/420 = 448 + 105/420 = 553/420 - 553/420 simplified gives 79/60
- So, 16/15 + 21/84 = 79/60
In mixed form: 119/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/15+21/84 16/15+42/84 16/30+21/84 48/15+21/84 16/15+63/84 16/45+21/84 80/15+21/84 16/75+21/84