Add 30/18 and 21/8
1st number: 1 12/18, 2nd number: 2 5/8
30/18 + 21/8 is 103/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
21/8 = 21 × 9/8 × 9 = 189/72 - Add the two like fractions:
120/72 + 189/72 = 120 + 189/72 = 309/72 - 309/72 simplified gives 103/24
- So, 30/18 + 21/8 = 103/24
In mixed form: 47/24
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