Add 20/45 and 18/15
1st number: 20/45, 2nd number: 1 3/15
20/45 + 18/15 is 74/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
20/45 = 20 × 1/45 × 1 = 20/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
18/15 = 18 × 3/15 × 3 = 54/45 - Add the two like fractions:
20/45 + 54/45 = 20 + 54/45 = 74/45 - So, 20/45 + 18/15 = 74/45
In mixed form: 129/45
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