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Add 18/21 and 6/90

18/21 + 6/90 is 97/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630
  2. For the 1st fraction, since 21 × 30 = 630,
    18/21 = 18 × 30/21 × 30 = 540/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    6/90 = 6 × 7/90 × 7 = 42/630
  4. Add the two fractions:
    540/630 + 42/630 = 540 + 42/630 = 582/630
  5. 582/630 simplified gives 97/105
  6. So, 18/21 + 6/90 = 97/105

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