Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 16/15 and 21/90

1st number: 1 1/15, 2nd number: 21/90

16/15 + 21/90 is 13/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 15 × 6 = 90,
    16/15 = 16 × 6/15 × 6 = 96/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    21/90 = 21 × 1/90 × 1 = 21/90
  4. Add the two like fractions:
    96/90 + 21/90 = 96 + 21/90 = 117/90
  5. 117/90 simplified gives 13/10
  6. So, 16/15 + 21/90 = 13/10
    In mixed form: 13/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com