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Add 21/12 and 54/70

1st number: 1 9/12, 2nd number: 54/70

21/12 + 54/70 is 353/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 70 is 420
  2. For the 1st fraction, since 12 × 35 = 420,
    21/12 = 21 × 35/12 × 35 = 735/420
  3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
    54/70 = 54 × 6/70 × 6 = 324/420
  4. Add the two fractions:
    735/420 + 324/420 = 735 + 324/420 = 1059/420
  5. After reducing the fraction, the answer is 353/140
  6. In mixed form: 273/140

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