Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 15/70 and 20/21

15/70 + 20/21 is 7/6.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 70 × 3 = 210,
    15/70 = 15 × 3/70 × 3 = 45/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    20/21 = 20 × 10/21 × 10 = 200/210
  4. Add the two like fractions:
    45/210 + 200/210 = 45 + 200/210 = 245/210
  5. 245/210 simplified gives 7/6
  6. So, 15/70 + 20/21 = 7/6
    In mixed form: 11/6

MathStep (Works offline)

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

Related:

© everydaycalculation.com