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Add 20/72 and 42/40

1st number: 20/72, 2nd number: 1 2/40

20/72 + 42/40 is 239/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 40 is 360
  2. For the 1st fraction, since 72 × 5 = 360,
    20/72 = 20 × 5/72 × 5 = 100/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    42/40 = 42 × 9/40 × 9 = 378/360
  4. Add the two fractions:
    100/360 + 378/360 = 100 + 378/360 = 478/360
  5. After reducing the fraction, the answer is 239/180
  6. In mixed form: 159/180

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