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Add 1/21 and 63/45

1st number: 1/21, 2nd number: 1 18/45

1/21 + 63/45 is 152/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    1/21 = 1 × 15/21 × 15 = 15/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    63/45 = 63 × 7/45 × 7 = 441/315
  4. Add the two like fractions:
    15/315 + 441/315 = 15 + 441/315 = 456/315
  5. 456/315 simplified gives 152/105
  6. So, 1/21 + 63/45 = 152/105
    In mixed form: 147/105

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