Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/10 and 70/72

1st number: 2 1/10, 2nd number: 70/72

21/10 + 70/72 is 553/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 10 × 36 = 360,
    21/10 = 21 × 36/10 × 36 = 756/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    70/72 = 70 × 5/72 × 5 = 350/360
  4. Add the two like fractions:
    756/360 + 350/360 = 756 + 350/360 = 1106/360
  5. 1106/360 simplified gives 553/180
  6. So, 21/10 + 70/72 = 553/180
    In mixed form: 313/180

MathStep (Works offline)

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

Related:

© everydaycalculation.com