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Add 42/54 and 7/20

42/54 + 7/20 is 203/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 20 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 54 × 10 = 540,
    42/54 = 42 × 10/54 × 10 = 420/540
  3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
    7/20 = 7 × 27/20 × 27 = 189/540
  4. Add the two like fractions:
    420/540 + 189/540 = 420 + 189/540 = 609/540
  5. 609/540 simplified gives 203/180
  6. So, 42/54 + 7/20 = 203/180
    In mixed form: 123/180

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