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Add 21/40 and 75/70

1st number: 21/40, 2nd number: 1 5/70

21/40 + 75/70 is 447/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 70 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    21/40 = 21 × 7/40 × 7 = 147/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    75/70 = 75 × 4/70 × 4 = 300/280
  4. Add the two like fractions:
    147/280 + 300/280 = 147 + 300/280 = 447/280
  5. So, 21/40 + 75/70 = 447/280
    In mixed form: 1167/280

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