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Add 1/90 and 21/63

1/90 + 21/63 is 31/90.

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,
    1/90 = 1 × 7/90 × 7 = 7/630
  3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
    21/63 = 21 × 10/63 × 10 = 210/630
  4. Add the two like fractions:
    7/630 + 210/630 = 7 + 210/630 = 217/630
  5. 217/630 simplified gives 31/90
  6. So, 1/90 + 21/63 = 31/90

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