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Add 20/75 and 21/63

20/75 + 21/63 is 3/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 63 is 1575

    Next, find the equivalent fraction of both fractional numbers with denominator 1575
  2. For the 1st fraction, since 75 × 21 = 1575,
    20/75 = 20 × 21/75 × 21 = 420/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    21/63 = 21 × 25/63 × 25 = 525/1575
  4. Add the two like fractions:
    420/1575 + 525/1575 = 420 + 525/1575 = 945/1575
  5. 945/1575 simplified gives 3/5
  6. So, 20/75 + 21/63 = 3/5

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