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Add 42/7 and 21/40

1st number: 6 0/7, 2nd number: 21/40

42/7 + 21/40 is 261/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    42/7 = 42 × 40/7 × 40 = 1680/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    21/40 = 21 × 7/40 × 7 = 147/280
  4. Add the two like fractions:
    1680/280 + 147/280 = 1680 + 147/280 = 1827/280
  5. 1827/280 simplified gives 261/40
  6. So, 42/7 + 21/40 = 261/40
    In mixed form: 621/40

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