Add 12/15 and 20/45
12/15 + 20/45 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
12/15 = 12 × 3/15 × 3 = 36/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
20/45 = 20 × 1/45 × 1 = 20/45 - Add the two like fractions:
36/45 + 20/45 = 36 + 20/45 = 56/45 - So, 12/15 + 20/45 = 56/45
In mixed form: 111/45
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