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Add 45/64 and 21/70

45/64 + 21/70 is 321/320.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 64 and 70 is 2240

    Next, find the equivalent fraction of both fractional numbers with denominator 2240
  2. For the 1st fraction, since 64 × 35 = 2240,
    45/64 = 45 × 35/64 × 35 = 1575/2240
  3. Likewise, for the 2nd fraction, since 70 × 32 = 2240,
    21/70 = 21 × 32/70 × 32 = 672/2240
  4. Add the two like fractions:
    1575/2240 + 672/2240 = 1575 + 672/2240 = 2247/2240
  5. 2247/2240 simplified gives 321/320
  6. So, 45/64 + 21/70 = 321/320
    In mixed form: 11/320

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