Add 1/84 and 42/15
1st number: 1/84, 2nd number: 2 12/15
1/84 + 42/15 is 1181/420.
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,
1/84 = 1 × 5/84 × 5 = 5/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Add the two like fractions:
5/420 + 1176/420 = 5 + 1176/420 = 1181/420 - So, 1/84 + 42/15 = 1181/420
In mixed form: 2341/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84+42/15 1/84+84/15 1/84+42/30 3/84+42/15 1/84+42/45 5/84+42/15 1/84+42/75 7/84+42/15