Add 7/30 and 4/42
7/30 + 4/42 is 23/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
4/42 = 4 × 5/42 × 5 = 20/210 - Add the two like fractions:
49/210 + 20/210 = 49 + 20/210 = 69/210 - 69/210 simplified gives 23/70
- So, 7/30 + 4/42 = 23/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+4/42 7/30+8/42 7/60+4/42 7/30+4/84 21/30+4/42 7/30+12/42 7/90+4/42 35/30+4/42 7/30+20/42 49/30+4/42 7/30+28/42