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Add 70/21 and 45/40

1st number: 3 7/21, 2nd number: 1 5/40

70/21 + 45/40 is 107/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840
  2. For the 1st fraction, since 21 × 40 = 840,
    70/21 = 70 × 40/21 × 40 = 2800/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    45/40 = 45 × 21/40 × 21 = 945/840
  4. Add the two fractions:
    2800/840 + 945/840 = 2800 + 945/840 = 3745/840
  5. After reducing the fraction, the answer is 107/24
  6. In mixed form: 411/24

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