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Add 1/72 and 4/90

1/72 + 4/90 is 7/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 72 × 5 = 360,
    1/72 = 1 × 5/72 × 5 = 5/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    4/90 = 4 × 4/90 × 4 = 16/360
  4. Add the two like fractions:
    5/360 + 16/360 = 5 + 16/360 = 21/360
  5. 21/360 simplified gives 7/120
  6. So, 1/72 + 4/90 = 7/120

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