Add 18/45 and 20/12
1st number: 18/45, 2nd number: 1 8/12
18/45 + 20/12 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
18/45 = 18 × 4/45 × 4 = 72/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
20/12 = 20 × 15/12 × 15 = 300/180 - Add the two like fractions:
72/180 + 300/180 = 72 + 300/180 = 372/180 - 372/180 simplified gives 31/15
- So, 18/45 + 20/12 = 31/15
In mixed form: 21/15
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