Add 28/8 and 18/42
1st number: 3 4/8, 2nd number: 18/42
28/8 + 18/42 is 55/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
28/8 = 28 × 21/8 × 21 = 588/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
18/42 = 18 × 4/42 × 4 = 72/168 - Add the two like fractions:
588/168 + 72/168 = 588 + 72/168 = 660/168 - 660/168 simplified gives 55/14
- So, 28/8 + 18/42 = 55/14
In mixed form: 313/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/8+18/42 28/8+36/42 28/16+18/42 28/8+18/84 84/8+18/42 28/8+54/42 28/24+18/42 28/8+90/42 28/40+18/42 28/56+18/42