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Subtract 7/10 from 28/21

1st number: 1 7/21, 2nd number: 7/10

28/21 - 7/10 is 19/30.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 21 × 10 = 210,
    28/21 = 28 × 10/21 × 10 = 280/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    7/10 = 7 × 21/10 × 21 = 147/210
  4. Subtract the two like fractions:
    280/210 - 147/210 = 280 - 147/210 = 133/210
  5. After reducing the fraction, the answer is 19/30

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