Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 10/27 from 30/21

1st number: 1 9/21, 2nd number: 10/27

30/21 - 10/27 is 200/189.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 27 is 189
  2. For the 1st fraction, since 21 × 9 = 189,
    30/21 = 30 × 9/21 × 9 = 270/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    10/27 = 10 × 7/27 × 7 = 70/189
  4. Subtract the two fractions:
    270/189 - 70/189 = 270 - 70/189 = 200/189
  5. In mixed form: 111/189

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com