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Add 21/45 and 28/54

21/45 + 28/54 is 133/135.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 54 is 270

    Next, find the equivalent fraction of both fractional numbers with denominator 270
  2. For the 1st fraction, since 45 × 6 = 270,
    21/45 = 21 × 6/45 × 6 = 126/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    28/54 = 28 × 5/54 × 5 = 140/270
  4. Add the two like fractions:
    126/270 + 140/270 = 126 + 140/270 = 266/270
  5. 266/270 simplified gives 133/135
  6. So, 21/45 + 28/54 = 133/135

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