Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 1/21 and 80/45

1st number: 1/21, 2nd number: 1 35/45

1/21 + 80/45 is 115/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    1/21 = 1 × 15/21 × 15 = 15/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    80/45 = 80 × 7/45 × 7 = 560/315
  4. Add the two like fractions:
    15/315 + 560/315 = 15 + 560/315 = 575/315
  5. 575/315 simplified gives 115/63
  6. So, 1/21 + 80/45 = 115/63
    In mixed form: 152/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com