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Add 42/70 and 6/90

42/70 + 6/90 is 2/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 70 × 9 = 630,
    42/70 = 42 × 9/70 × 9 = 378/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    6/90 = 6 × 7/90 × 7 = 42/630
  4. Add the two like fractions:
    378/630 + 42/630 = 378 + 42/630 = 420/630
  5. 420/630 simplified gives 2/3
  6. So, 42/70 + 6/90 = 2/3

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