Add 21/5 and 28/18
1st number: 4 1/5, 2nd number: 1 10/18
21/5 + 28/18 is 259/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Add the two like fractions:
378/90 + 140/90 = 378 + 140/90 = 518/90 - 518/90 simplified gives 259/45
- So, 21/5 + 28/18 = 259/45
In mixed form: 534/45
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