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Add 5/20 and 42/90

5/20 + 42/90 is 43/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    5/20 = 5 × 9/20 × 9 = 45/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    42/90 = 42 × 2/90 × 2 = 84/180
  4. Add the two fractions:
    45/180 + 84/180 = 45 + 84/180 = 129/180
  5. After reducing the fraction, the answer is 43/60

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