Add 54/15 and 8/42
1st number: 3 9/15, 2nd number: 8/42
54/15 + 8/42 is 398/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
54/15 = 54 × 14/15 × 14 = 756/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Add the two like fractions:
756/210 + 40/210 = 756 + 40/210 = 796/210 - 796/210 simplified gives 398/105
- So, 54/15 + 8/42 = 398/105
In mixed form: 383/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+16/42 54/30+8/42 54/15+8/84 54/15+24/42 54/45+8/42 54/15+40/42 54/75+8/42 54/15+56/42