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Add 72/20 and 42/4

1st number: 3 12/20, 2nd number: 10 2/4

72/20 + 42/4 is 141/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 4 is 20
  2. For the 1st fraction, since 20 × 1 = 20,
    72/20 = 72 × 1/20 × 1 = 72/20
  3. Likewise, for the 2nd fraction, since 4 × 5 = 20,
    42/4 = 42 × 5/4 × 5 = 210/20
  4. Add the two fractions:
    72/20 + 210/20 = 72 + 210/20 = 282/20
  5. After reducing the fraction, the answer is 141/10
  6. In mixed form: 141/10

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