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Add 10/42 and 70/90

10/42 + 70/90 is 64/63.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 42 × 15 = 630,
    10/42 = 10 × 15/42 × 15 = 150/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    70/90 = 70 × 7/90 × 7 = 490/630
  4. Add the two like fractions:
    150/630 + 490/630 = 150 + 490/630 = 640/630
  5. 640/630 simplified gives 64/63
  6. So, 10/42 + 70/90 = 64/63
    In mixed form: 11/63

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