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Add 20/42 and 28/30

20/42 + 28/30 is 148/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    20/42 = 20 × 5/42 × 5 = 100/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Add the two like fractions:
    100/210 + 196/210 = 100 + 196/210 = 296/210
  5. 296/210 simplified gives 148/105
  6. So, 20/42 + 28/30 = 148/105
    In mixed form: 143/105

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