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Add 72/7 and 42/20

1st number: 10 2/7, 2nd number: 2 2/20

72/7 + 42/20 is 867/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140
  2. For the 1st fraction, since 7 × 20 = 140,
    72/7 = 72 × 20/7 × 20 = 1440/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    42/20 = 42 × 7/20 × 7 = 294/140
  4. Add the two fractions:
    1440/140 + 294/140 = 1440 + 294/140 = 1734/140
  5. After reducing the fraction, the answer is 867/70
  6. In mixed form: 1227/70

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