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Add 21/54 and 42/10

1st number: 21/54, 2nd number: 4 2/10

21/54 + 42/10 is 413/90.

Steps for adding fractions

  1. 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
  2. For the 1st fraction, since 54 × 5 = 270,
    21/54 = 21 × 5/54 × 5 = 105/270
  3. Likewise, for the 2nd fraction, since 10 × 27 = 270,
    42/10 = 42 × 27/10 × 27 = 1134/270
  4. Add the two like fractions:
    105/270 + 1134/270 = 105 + 1134/270 = 1239/270
  5. 1239/270 simplified gives 413/90
  6. So, 21/54 + 42/10 = 413/90
    In mixed form: 453/90

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