Add 12/20 and 28/45
12/20 + 28/45 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
28/45 = 28 × 4/45 × 4 = 112/180 - Add the two like fractions:
108/180 + 112/180 = 108 + 112/180 = 220/180 - 220/180 simplified gives 11/9
- So, 12/20 + 28/45 = 11/9
In mixed form: 12/9
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