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Add 20/28 and 7/72

20/28 + 7/72 is 409/504.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 28 × 18 = 504,
    20/28 = 20 × 18/28 × 18 = 360/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    7/72 = 7 × 7/72 × 7 = 49/504
  4. Add the two like fractions:
    360/504 + 49/504 = 360 + 49/504 = 409/504
  5. So, 20/28 + 7/72 = 409/504

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