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Add 21/4 and 21/20

1st number: 5 1/4, 2nd number: 1 1/20

21/4 + 21/20 is 63/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 20 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    21/4 = 21 × 5/4 × 5 = 105/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    21/20 = 21 × 1/20 × 1 = 21/20
  4. Add the two like fractions:
    105/20 + 21/20 = 105 + 21/20 = 126/20
  5. 126/20 simplified gives 63/10
  6. So, 21/4 + 21/20 = 63/10
    In mixed form: 63/10

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