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Subtract 20/45 from 50/21

1st number: 2 8/21, 2nd number: 20/45

50/21 - 20/45 is 122/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    50/21 = 50 × 15/21 × 15 = 750/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    20/45 = 20 × 7/45 × 7 = 140/315
  4. Subtract the two like fractions:
    750/315 - 140/315 = 750 - 140/315 = 610/315
  5. After reducing the fraction, the answer is 122/63
  6. In mixed form: 159/63

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