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Add 21/30 and 90/72

1st number: 21/30, 2nd number: 1 18/72

21/30 + 90/72 is 39/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 30 × 12 = 360,
    21/30 = 21 × 12/30 × 12 = 252/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    90/72 = 90 × 5/72 × 5 = 450/360
  4. Add the two like fractions:
    252/360 + 450/360 = 252 + 450/360 = 702/360
  5. 702/360 simplified gives 39/20
  6. So, 21/30 + 90/72 = 39/20
    In mixed form: 119/20

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