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Add 21/54 and 63/20

1st number: 21/54, 2nd number: 3 3/20

21/54 + 63/20 is 637/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 20 is 540
  2. For the 1st fraction, since 54 × 10 = 540,
    21/54 = 21 × 10/54 × 10 = 210/540
  3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
    63/20 = 63 × 27/20 × 27 = 1701/540
  4. Add the two fractions:
    210/540 + 1701/540 = 210 + 1701/540 = 1911/540
  5. 1911/540 simplified gives 637/180
  6. So, 21/54 + 63/20 = 637/180
    In mixed form: 397/180

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