Add 18/21 and 8/30
18/21 + 8/30 is 118/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
8/30 = 8 × 7/30 × 7 = 56/210 - Add the two like fractions:
180/210 + 56/210 = 180 + 56/210 = 236/210 - 236/210 simplified gives 118/105
- So, 18/21 + 8/30 = 118/105
In mixed form: 113/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+8/30 18/21+16/30 18/42+8/30 18/21+8/60 54/21+8/30 18/21+24/30 18/63+8/30 18/21+8/90 90/21+8/30 18/21+40/30 18/21+56/30