Add 28/36 and 20/45
28/36 + 20/45 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
28/36 = 28 × 5/36 × 5 = 140/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
140/180 + 80/180 = 140 + 80/180 = 220/180 - 220/180 simplified gives 11/9
- So, 28/36 + 20/45 = 11/9
In mixed form: 12/9
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