Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/70 and 84/98

21/70 + 84/98 is 81/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 98 is 490

    Next, find the equivalent fraction of both fractional numbers with denominator 490
  2. For the 1st fraction, since 70 × 7 = 490,
    21/70 = 21 × 7/70 × 7 = 147/490
  3. Likewise, for the 2nd fraction, since 98 × 5 = 490,
    84/98 = 84 × 5/98 × 5 = 420/490
  4. Add the two like fractions:
    147/490 + 420/490 = 147 + 420/490 = 567/490
  5. 567/490 simplified gives 81/70
  6. So, 21/70 + 84/98 = 81/70
    In mixed form: 111/70

MathStep (Works offline)

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

Related:

© everydaycalculation.com