Add 40/15 and 42/84
1st number: 2 10/15, 2nd number: 42/84
40/15 + 42/84 is 19/6.
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,
40/15 = 40 × 28/15 × 28 = 1120/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
42/84 = 42 × 5/84 × 5 = 210/420 - Add the two like fractions:
1120/420 + 210/420 = 1120 + 210/420 = 1330/420 - 1330/420 simplified gives 19/6
- So, 40/15 + 42/84 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/15+42/84 40/30+42/84 40/45+42/84 40/75+42/84