Add 84/60 and 28/42
1st number: 1 24/60, 2nd number: 28/42
84/60 + 28/42 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
84/60 = 84 × 7/60 × 7 = 588/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
28/42 = 28 × 10/42 × 10 = 280/420 - Add the two like fractions:
588/420 + 280/420 = 588 + 280/420 = 868/420 - 868/420 simplified gives 31/15
- So, 84/60 + 28/42 = 31/15
In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+56/42 84/60+28/84 84/60+84/42