Add 7/30 and 15/42
7/30 + 15/42 is 62/105.
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,
15/42 = 15 × 5/42 × 5 = 75/210 - Add the two like fractions:
49/210 + 75/210 = 49 + 75/210 = 124/210 - 124/210 simplified gives 62/105
- So, 7/30 + 15/42 = 62/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+15/42 7/30+30/42 7/60+15/42 7/30+15/84 21/30+15/42 7/30+45/42 7/90+15/42 35/30+15/42 7/30+75/42 49/30+15/42