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Subtract 4/21 from 7/10

7/10 - 4/21 is 107/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 10 × 21 = 210,
    7/10 = 7 × 21/10 × 21 = 147/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    4/21 = 4 × 10/21 × 10 = 40/210
  4. Subtract the two like fractions:
    147/210 - 40/210 = 147 - 40/210 = 107/210

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