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Subtract 4/5 from 21/9

1st number: 2 3/9, 2nd number: 4/5

21/9 - 4/5 is 23/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 5 is 45

    Next, find the equivalent fraction of both fractional numbers with denominator 45
  2. For the 1st fraction, since 9 × 5 = 45,
    21/9 = 21 × 5/9 × 5 = 105/45
  3. Likewise, for the 2nd fraction, since 5 × 9 = 45,
    4/5 = 4 × 9/5 × 9 = 36/45
  4. Subtract the two like fractions:
    105/45 - 36/45 = 105 - 36/45 = 69/45
  5. After reducing the fraction, the answer is 23/15
  6. In mixed form: 18/15

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