Add 18/30 and 40/7
1st number: 18/30, 2nd number: 5 5/7
18/30 + 40/7 is 221/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
18/30 = 18 × 7/30 × 7 = 126/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
40/7 = 40 × 30/7 × 30 = 1200/210 - Add the two like fractions:
126/210 + 1200/210 = 126 + 1200/210 = 1326/210 - 1326/210 simplified gives 221/35
- So, 18/30 + 40/7 = 221/35
In mixed form: 611/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+40/7 18/30+80/7 18/60+40/7 18/30+40/14 54/30+40/7 18/90+40/7 18/30+40/21 90/30+40/7 18/30+40/35 18/30+40/49