Add 21/54 and 15/10
1st number: 21/54, 2nd number: 1 5/10
21/54 + 15/10 is 17/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
15/10 = 15 × 27/10 × 27 = 405/270 - Add the two like fractions:
105/270 + 405/270 = 105 + 405/270 = 510/270 - 510/270 simplified gives 17/9
- So, 21/54 + 15/10 = 17/9
In mixed form: 18/9
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