Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 42/90 and 21/5

1st number: 42/90, 2nd number: 4 1/5

42/90 + 21/5 is 14/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 5 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 90 × 1 = 90,
    42/90 = 42 × 1/90 × 1 = 42/90
  3. Likewise, for the 2nd fraction, since 5 × 18 = 90,
    21/5 = 21 × 18/5 × 18 = 378/90
  4. Add the two like fractions:
    42/90 + 378/90 = 42 + 378/90 = 420/90
  5. 420/90 simplified gives 14/3
  6. So, 42/90 + 21/5 = 14/3
    In mixed form: 42/3

MathStep (Works offline)

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

Related:

© everydaycalculation.com