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Add 21/36 and 36/70

21/36 + 36/70 is 461/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 70 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 36 × 35 = 1260,
    21/36 = 21 × 35/36 × 35 = 735/1260
  3. Likewise, for the 2nd fraction, since 70 × 18 = 1260,
    36/70 = 36 × 18/70 × 18 = 648/1260
  4. Add the two like fractions:
    735/1260 + 648/1260 = 735 + 648/1260 = 1383/1260
  5. 1383/1260 simplified gives 461/420
  6. So, 21/36 + 36/70 = 461/420
    In mixed form: 141/420

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