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Add 21/72 and 6/70

21/72 + 6/70 is 317/840.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 70 is 2520
  2. For the 1st fraction, since 72 × 35 = 2520,
    21/72 = 21 × 35/72 × 35 = 735/2520
  3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
    6/70 = 6 × 36/70 × 36 = 216/2520
  4. Add the two fractions:
    735/2520 + 216/2520 = 735 + 216/2520 = 951/2520
  5. 951/2520 simplified gives 317/840
  6. So, 21/72 + 6/70 = 317/840

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