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Add 21/18 and 42/10

1st number: 1 3/18, 2nd number: 4 2/10

21/18 + 42/10 is 161/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 10 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    21/18 = 21 × 5/18 × 5 = 105/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    42/10 = 42 × 9/10 × 9 = 378/90
  4. Add the two like fractions:
    105/90 + 378/90 = 105 + 378/90 = 483/90
  5. 483/90 simplified gives 161/30
  6. So, 21/18 + 42/10 = 161/30
    In mixed form: 511/30

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