Add 7/15 and 5/42
7/15 + 5/42 is 41/70.
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,
7/15 = 7 × 14/15 × 14 = 98/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
5/42 = 5 × 5/42 × 5 = 25/210 - Add the two like fractions:
98/210 + 25/210 = 98 + 25/210 = 123/210 - 123/210 simplified gives 41/70
- So, 7/15 + 5/42 = 41/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15+5/42 7/15+10/42 7/30+5/42 7/15+5/84 21/15+5/42 7/15+15/42 7/45+5/42 35/15+5/42 7/15+25/42 7/75+5/42 49/15+5/42 7/15+35/42