Add 9/30 and 7/42
9/30 + 7/42 is 7/15.
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,
9/30 = 9 × 7/30 × 7 = 63/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Add the two like fractions:
63/210 + 35/210 = 63 + 35/210 = 98/210 - 98/210 simplified gives 7/15
- So, 9/30 + 7/42 = 7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30+7/42 9/30+14/42 9/60+7/42 9/30+7/84 27/30+7/42 9/30+21/42 9/90+7/42 45/30+7/42 9/30+35/42 63/30+7/42 9/30+49/42