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Add 21/40 and 32/70

21/40 + 32/70 is 55/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 70 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    21/40 = 21 × 7/40 × 7 = 147/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    32/70 = 32 × 4/70 × 4 = 128/280
  4. Add the two like fractions:
    147/280 + 128/280 = 147 + 128/280 = 275/280
  5. 275/280 simplified gives 55/56
  6. So, 21/40 + 32/70 = 55/56

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