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Add 3/40 and 30/21

1st number: 3/40, 2nd number: 1 9/21

3/40 + 30/21 is 421/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    3/40 = 3 × 21/40 × 21 = 63/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    30/21 = 30 × 40/21 × 40 = 1200/840
  4. Add the two like fractions:
    63/840 + 1200/840 = 63 + 1200/840 = 1263/840
  5. 1263/840 simplified gives 421/280
  6. So, 3/40 + 30/21 = 421/280
    In mixed form: 1141/280

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