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Add 70/90 and 40/42

70/90 + 40/42 is 109/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 42 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    70/90 = 70 × 7/90 × 7 = 490/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    40/42 = 40 × 15/42 × 15 = 600/630
  4. Add the two like fractions:
    490/630 + 600/630 = 490 + 600/630 = 1090/630
  5. 1090/630 simplified gives 109/63
  6. So, 70/90 + 40/42 = 109/63
    In mixed form: 146/63

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