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Add 21/4 and 42/63

1st number: 5 1/4, 2nd number: 42/63

21/4 + 42/63 is 71/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 63 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 4 × 63 = 252,
    21/4 = 21 × 63/4 × 63 = 1323/252
  3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
    42/63 = 42 × 4/63 × 4 = 168/252
  4. Add the two like fractions:
    1323/252 + 168/252 = 1323 + 168/252 = 1491/252
  5. 1491/252 simplified gives 71/12
  6. So, 21/4 + 42/63 = 71/12
    In mixed form: 511/12

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