Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 45/40 and 20/21

1st number: 1 5/40, 2nd number: 20/21

45/40 + 20/21 is 349/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    45/40 = 45 × 21/40 × 21 = 945/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    20/21 = 20 × 40/21 × 40 = 800/840
  4. Add the two like fractions:
    945/840 + 800/840 = 945 + 800/840 = 1745/840
  5. 1745/840 simplified gives 349/168
  6. So, 45/40 + 20/21 = 349/168
    In mixed form: 213/168

MathStep (Works offline)

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

Related:

© everydaycalculation.com