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Add 4/20 and 21/64

4/20 + 21/64 is 169/320.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 64 is 320
  2. For the 1st fraction, since 20 × 16 = 320,
    4/20 = 4 × 16/20 × 16 = 64/320
  3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
    21/64 = 21 × 5/64 × 5 = 105/320
  4. Add the two fractions:
    64/320 + 105/320 = 64 + 105/320 = 169/320

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