Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/10 from 84/18

1st number: 4 12/18, 2nd number: 2 1/10

84/18 - 21/10 is 77/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 10 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    84/18 = 84 × 5/18 × 5 = 420/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    21/10 = 21 × 9/10 × 9 = 189/90
  4. Subtract the two like fractions:
    420/90 - 189/90 = 420 - 189/90 = 231/90
  5. After reducing the fraction, the answer is 77/30
  6. In mixed form: 217/30

MathStep (Works offline)

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

Related:

© everydaycalculation.com