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Add 72/90 and 2/21

72/90 + 2/21 is 94/105.

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,
    72/90 = 72 × 7/90 × 7 = 504/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    2/21 = 2 × 30/21 × 30 = 60/630
  4. Add the two like fractions:
    504/630 + 60/630 = 504 + 60/630 = 564/630
  5. 564/630 simplified gives 94/105
  6. So, 72/90 + 2/21 = 94/105

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