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Add 30/21 and 42/8

1st number: 1 9/21, 2nd number: 5 2/8

30/21 + 42/8 is 187/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    30/21 = 30 × 8/21 × 8 = 240/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    42/8 = 42 × 21/8 × 21 = 882/168
  4. Add the two like fractions:
    240/168 + 882/168 = 240 + 882/168 = 1122/168
  5. 1122/168 simplified gives 187/28
  6. So, 30/21 + 42/8 = 187/28
    In mixed form: 619/28

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