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Add 42/80 and 21/54

42/80 + 21/54 is 329/360.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 54 is 2160

    Next, find the equivalent fraction of both fractional numbers with denominator 2160
  2. For the 1st fraction, since 80 × 27 = 2160,
    42/80 = 42 × 27/80 × 27 = 1134/2160
  3. Likewise, for the 2nd fraction, since 54 × 40 = 2160,
    21/54 = 21 × 40/54 × 40 = 840/2160
  4. Add the two like fractions:
    1134/2160 + 840/2160 = 1134 + 840/2160 = 1974/2160
  5. 1974/2160 simplified gives 329/360
  6. So, 42/80 + 21/54 = 329/360

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