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Add 84/20 and 21/70

1st number: 4 4/20, 2nd number: 21/70

84/20 + 21/70 is 9/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 70 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    84/20 = 84 × 7/20 × 7 = 588/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    21/70 = 21 × 2/70 × 2 = 42/140
  4. Add the two like fractions:
    588/140 + 42/140 = 588 + 42/140 = 630/140
  5. 630/140 simplified gives 9/2
  6. So, 84/20 + 21/70 = 9/2
    In mixed form: 41/2

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