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Add 72/42 and 3/80

1st number: 1 30/42, 2nd number: 3/80

72/42 + 3/80 is 981/560.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    72/42 = 72 × 40/42 × 40 = 2880/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    3/80 = 3 × 21/80 × 21 = 63/1680
  4. Add the two fractions:
    2880/1680 + 63/1680 = 2880 + 63/1680 = 2943/1680
  5. 2943/1680 simplified gives 981/560
  6. So, 72/42 + 3/80 = 981/560
    In mixed form: 1421/560

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