Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 90/21 and 70/60

1st number: 4 6/21, 2nd number: 1 10/60

90/21 + 70/60 is 229/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 60 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    90/21 = 90 × 20/21 × 20 = 1800/420
  3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
    70/60 = 70 × 7/60 × 7 = 490/420
  4. Add the two like fractions:
    1800/420 + 490/420 = 1800 + 490/420 = 2290/420
  5. 2290/420 simplified gives 229/42
  6. So, 90/21 + 70/60 = 229/42
    In mixed form: 519/42

MathStep (Works offline)

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

Related:

© everydaycalculation.com