Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/42 and 45/5

1st number: 21/42, 2nd number: 9 0/5

21/42 + 45/5 is 19/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 5 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    21/42 = 21 × 5/42 × 5 = 105/210
  3. Likewise, for the 2nd fraction, since 5 × 42 = 210,
    45/5 = 45 × 42/5 × 42 = 1890/210
  4. Add the two fractions:
    105/210 + 1890/210 = 105 + 1890/210 = 1995/210
  5. 1995/210 simplified gives 19/2
  6. So, 21/42 + 45/5 = 19/2
    In mixed form: 91/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com