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Add 70/21 and 63/45

1st number: 3 7/21, 2nd number: 1 18/45

70/21 + 63/45 is 71/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315
  2. For the 1st fraction, since 21 × 15 = 315,
    70/21 = 70 × 15/21 × 15 = 1050/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    63/45 = 63 × 7/45 × 7 = 441/315
  4. Add the two fractions:
    1050/315 + 441/315 = 1050 + 441/315 = 1491/315
  5. After reducing the fraction, the answer is 71/15
  6. In mixed form: 411/15

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