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Add 15/8 and 21/70

1st number: 1 7/8, 2nd number: 21/70

15/8 + 21/70 is 87/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 70 is 280
  2. For the 1st fraction, since 8 × 35 = 280,
    15/8 = 15 × 35/8 × 35 = 525/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    21/70 = 21 × 4/70 × 4 = 84/280
  4. Add the two fractions:
    525/280 + 84/280 = 525 + 84/280 = 609/280
  5. After reducing the fraction, the answer is 87/40
  6. In mixed form: 27/40

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