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Add 72/42 and 90/54

1st number: 1 30/42, 2nd number: 1 36/54

72/42 + 90/54 is 71/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 54 is 378
  2. For the 1st fraction, since 42 × 9 = 378,
    72/42 = 72 × 9/42 × 9 = 648/378
  3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
    90/54 = 90 × 7/54 × 7 = 630/378
  4. Add the two fractions:
    648/378 + 630/378 = 648 + 630/378 = 1278/378
  5. 1278/378 simplified gives 71/21
  6. So, 72/42 + 90/54 = 71/21
    In mixed form: 38/21

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