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Add 20/72 and 6/21

20/72 + 6/21 is 71/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 21 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    20/72 = 20 × 7/72 × 7 = 140/504
  3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
    6/21 = 6 × 24/21 × 24 = 144/504
  4. Add the two like fractions:
    140/504 + 144/504 = 140 + 144/504 = 284/504
  5. 284/504 simplified gives 71/126
  6. So, 20/72 + 6/21 = 71/126

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