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Add 21/35 and 12/40

21/35 + 12/40 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 35 × 8 = 280,
    21/35 = 21 × 8/35 × 8 = 168/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    12/40 = 12 × 7/40 × 7 = 84/280
  4. Add the two like fractions:
    168/280 + 84/280 = 168 + 84/280 = 252/280
  5. 252/280 simplified gives 9/10
  6. So, 21/35 + 12/40 = 9/10

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