Add 7/30 and 18/42
7/30 + 18/42 is 139/210.
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,
18/42 = 18 × 5/42 × 5 = 90/210 - Add the two like fractions:
49/210 + 90/210 = 49 + 90/210 = 139/210 - So, 7/30 + 18/42 = 139/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+18/42 7/30+36/42 7/60+18/42 7/30+18/84 21/30+18/42 7/30+54/42 7/90+18/42 35/30+18/42 7/30+90/42 49/30+18/42