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Add 1/90 and 8/21

1/90 + 8/21 is 247/630.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 21 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 21 × 30 = 630,
    8/21 = 8 × 30/21 × 30 = 240/630
  4. Add the two like fractions:
    7/630 + 240/630 = 7 + 240/630 = 247/630
  5. So, 1/90 + 8/21 = 247/630

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