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Add 20/21 and 28/32

20/21 + 28/32 is 307/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 32 is 672

    Next, find the equivalent fraction of both fractional numbers with denominator 672
  2. For the 1st fraction, since 21 × 32 = 672,
    20/21 = 20 × 32/21 × 32 = 640/672
  3. Likewise, for the 2nd fraction, since 32 × 21 = 672,
    28/32 = 28 × 21/32 × 21 = 588/672
  4. Add the two like fractions:
    640/672 + 588/672 = 640 + 588/672 = 1228/672
  5. 1228/672 simplified gives 307/168
  6. So, 20/21 + 28/32 = 307/168
    In mixed form: 1139/168

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