Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 45/7 and 72/20

1st number: 6 3/7, 2nd number: 3 12/20

45/7 + 72/20 is 351/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    45/7 = 45 × 20/7 × 20 = 900/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    72/20 = 72 × 7/20 × 7 = 504/140
  4. Add the two like fractions:
    900/140 + 504/140 = 900 + 504/140 = 1404/140
  5. 1404/140 simplified gives 351/35
  6. So, 45/7 + 72/20 = 351/35
    In mixed form: 101/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com