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Subtract 21/90 from 2/7

2/7 - 21/90 is 11/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 7 × 90 = 630,
    2/7 = 2 × 90/7 × 90 = 180/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Subtract the two like fractions:
    180/630 - 147/630 = 180 - 147/630 = 33/630
  5. After reducing the fraction, the answer is 11/210

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