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Add 21/30 and 28/36

21/30 + 28/36 is 133/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 36 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 30 × 6 = 180,
    21/30 = 21 × 6/30 × 6 = 126/180
  3. Likewise, for the 2nd fraction, since 36 × 5 = 180,
    28/36 = 28 × 5/36 × 5 = 140/180
  4. Add the two like fractions:
    126/180 + 140/180 = 126 + 140/180 = 266/180
  5. 266/180 simplified gives 133/90
  6. So, 21/30 + 28/36 = 133/90
    In mixed form: 143/90

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