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Add 42/10 and 21/84

1st number: 4 2/10, 2nd number: 21/84

42/10 + 21/84 is 89/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 84 is 420
  2. For the 1st fraction, since 10 × 42 = 420,
    42/10 = 42 × 42/10 × 42 = 1764/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    21/84 = 21 × 5/84 × 5 = 105/420
  4. Add the two fractions:
    1764/420 + 105/420 = 1764 + 105/420 = 1869/420
  5. After reducing the fraction, the answer is 89/20
  6. In mixed form: 49/20

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