Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 6/90 from 21/16

1st number: 1 5/16, 2nd number: 6/90

21/16 - 6/90 is 299/240.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 90 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 16 × 45 = 720,
    21/16 = 21 × 45/16 × 45 = 945/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    6/90 = 6 × 8/90 × 8 = 48/720
  4. Subtract the two like fractions:
    945/720 - 48/720 = 945 - 48/720 = 897/720
  5. After reducing the fraction, the answer is 299/240
  6. In mixed form: 159/240

MathStep (Works offline)

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

Related:

© everydaycalculation.com