Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/70 and 21/8

1st number: 7/70, 2nd number: 2 5/8

7/70 + 21/8 is 109/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 8 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    7/70 = 7 × 4/70 × 4 = 28/280
  3. Likewise, for the 2nd fraction, since 8 × 35 = 280,
    21/8 = 21 × 35/8 × 35 = 735/280
  4. Add the two like fractions:
    28/280 + 735/280 = 28 + 735/280 = 763/280
  5. 763/280 simplified gives 109/40
  6. So, 7/70 + 21/8 = 109/40
    In mixed form: 229/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com