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Add 42/63 and 40/90

42/63 + 40/90 is 10/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 63 × 10 = 630,
    42/63 = 42 × 10/63 × 10 = 420/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    40/90 = 40 × 7/90 × 7 = 280/630
  4. Add the two like fractions:
    420/630 + 280/630 = 420 + 280/630 = 700/630
  5. 700/630 simplified gives 10/9
  6. So, 42/63 + 40/90 = 10/9
    In mixed form: 11/9

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