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Add 70/21 and 40/60

1st number: 3 7/21, 2nd number: 40/60

70/21 + 40/60 is 4/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 60 is 420
  2. For the 1st fraction, since 21 × 20 = 420,
    70/21 = 70 × 20/21 × 20 = 1400/420
  3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
    40/60 = 40 × 7/60 × 7 = 280/420
  4. Add the two fractions:
    1400/420 + 280/420 = 1400 + 280/420 = 1680/420
  5. After reducing the fraction, the answer is 4/1

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