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Add 21/70 and 45/40

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

21/70 + 45/40 is 57/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    21/70 = 21 × 4/70 × 4 = 84/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    45/40 = 45 × 7/40 × 7 = 315/280
  4. Add the two like fractions:
    84/280 + 315/280 = 84 + 315/280 = 399/280
  5. 399/280 simplified gives 57/40
  6. So, 21/70 + 45/40 = 57/40
    In mixed form: 117/40

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