Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/14 and 9/90

1st number: 1 7/14, 2nd number: 9/90

21/14 + 9/90 is 8/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 14 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 14 × 45 = 630,
    21/14 = 21 × 45/14 × 45 = 945/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    9/90 = 9 × 7/90 × 7 = 63/630
  4. Add the two like fractions:
    945/630 + 63/630 = 945 + 63/630 = 1008/630
  5. 1008/630 simplified gives 8/5
  6. So, 21/14 + 9/90 = 8/5
    In mixed form: 13/5

MathStep (Works offline)

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

Related:

© everydaycalculation.com