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Add 70/21 and 8/40

1st number: 3 7/21, 2nd number: 8/40

70/21 + 8/40 is 53/15.

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,
    8/40 = 8 × 21/40 × 21 = 168/840
  4. Add the two fractions:
    2800/840 + 168/840 = 2800 + 168/840 = 2968/840
  5. 2968/840 simplified gives 53/15
  6. So, 70/21 + 8/40 = 53/15
    In mixed form: 38/15

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