Add 18/20 and 20/45
18/20 + 20/45 is 121/90.
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,
18/20 = 18 × 9/20 × 9 = 162/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
20/45 = 20 × 4/45 × 4 = 80/180 - Add the two like fractions:
162/180 + 80/180 = 162 + 80/180 = 242/180 - 242/180 simplified gives 121/90
- So, 18/20 + 20/45 = 121/90
In mixed form: 131/90
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