Add 21/18 and 28/45
1st number: 1 3/18, 2nd number: 28/45
21/18 + 28/45 is 161/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Add the two like fractions:
105/90 + 56/90 = 105 + 56/90 = 161/90 - So, 21/18 + 28/45 = 161/90
In mixed form: 171/90
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