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Subtract 12/72 from 21/5

1st number: 4 1/5, 2nd number: 12/72

21/5 - 12/72 is 121/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 5 × 72 = 360,
    21/5 = 21 × 72/5 × 72 = 1512/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    12/72 = 12 × 5/72 × 5 = 60/360
  4. Subtract the two like fractions:
    1512/360 - 60/360 = 1512 - 60/360 = 1452/360
  5. After reducing the fraction, the answer is 121/30
  6. In mixed form: 41/30

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