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Add 12/90 and 42/63

12/90 + 42/63 is 4/5.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    12/90 = 12 × 7/90 × 7 = 84/630
  3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
    42/63 = 42 × 10/63 × 10 = 420/630
  4. Add the two like fractions:
    84/630 + 420/630 = 84 + 420/630 = 504/630
  5. 504/630 simplified gives 4/5
  6. So, 12/90 + 42/63 = 4/5

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