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Subtract 45/7 from 21/15

1st number: 1 6/15, 2nd number: 6 3/7

21/15 - 45/7 is -176/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 7 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    21/15 = 21 × 7/15 × 7 = 147/105
  3. Likewise, for the 2nd fraction, since 7 × 15 = 105,
    45/7 = 45 × 15/7 × 15 = 675/105
  4. Subtract the two like fractions:
    147/105 - 675/105 = 147 - 675/105 = -528/105
  5. After reducing the fraction, the answer is -176/35

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