Add 12/8 and 21/30
1st number: 1 4/8, 2nd number: 21/30
12/8 + 21/30 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
12/8 = 12 × 15/8 × 15 = 180/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Add the two like fractions:
180/120 + 84/120 = 180 + 84/120 = 264/120 - 264/120 simplified gives 11/5
- So, 12/8 + 21/30 = 11/5
In mixed form: 21/5
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