Add 20/45 and 21/12
1st number: 20/45, 2nd number: 1 9/12
20/45 + 21/12 is 79/36.
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,
20/45 = 20 × 4/45 × 4 = 80/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Add the two like fractions:
80/180 + 315/180 = 80 + 315/180 = 395/180 - 395/180 simplified gives 79/36
- So, 20/45 + 21/12 = 79/36
In mixed form: 27/36
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