Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 30/27 from 10/21

1st number: 10/21, 2nd number: 1 3/27

10/21 - 30/27 is -40/63.

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,
    10/21 = 10 × 9/21 × 9 = 90/189
  3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
    30/27 = 30 × 7/27 × 7 = 210/189
  4. Subtract the two fractions:
    90/189 - 210/189 = 90 - 210/189 = -120/189
  5. After reducing the fraction, the answer is -40/63

Related:

Use fraction calculator with our all-in-one calculator app: Download for Android, Download for iOS

© everydaycalculation.com