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Add 70/42 and 90/72

1st number: 1 28/42, 2nd number: 1 18/72

70/42 + 90/72 is 35/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 42 × 12 = 504,
    70/42 = 70 × 12/42 × 12 = 840/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    90/72 = 90 × 7/72 × 7 = 630/504
  4. Add the two like fractions:
    840/504 + 630/504 = 840 + 630/504 = 1470/504
  5. 1470/504 simplified gives 35/12
  6. So, 70/42 + 90/72 = 35/12
    In mixed form: 211/12

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