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Add 21/90 and 30/40

21/90 + 30/40 is 59/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    21/90 = 21 × 4/90 × 4 = 84/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    30/40 = 30 × 9/40 × 9 = 270/360
  4. Add the two like fractions:
    84/360 + 270/360 = 84 + 270/360 = 354/360
  5. 354/360 simplified gives 59/60
  6. So, 21/90 + 30/40 = 59/60

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