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Add 21/20 and 72/27

1st number: 1 1/20, 2nd number: 2 18/27

21/20 + 72/27 is 223/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 27 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 20 × 27 = 540,
    21/20 = 21 × 27/20 × 27 = 567/540
  3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
    72/27 = 72 × 20/27 × 20 = 1440/540
  4. Add the two like fractions:
    567/540 + 1440/540 = 567 + 1440/540 = 2007/540
  5. 2007/540 simplified gives 223/60
  6. So, 21/20 + 72/27 = 223/60
    In mixed form: 343/60

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