Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 70/21 and 40/30

1st number: 3 7/21, 2nd number: 1 10/30

70/21 + 40/30 is 14/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 30 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    70/21 = 70 × 10/21 × 10 = 700/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    40/30 = 40 × 7/30 × 7 = 280/210
  4. Add the two fractions:
    700/210 + 280/210 = 700 + 280/210 = 980/210
  5. 980/210 simplified gives 14/3
  6. So, 70/21 + 40/30 = 14/3
    In mixed form: 42/3

MathStep (Works offline)

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

Related:

© everydaycalculation.com