Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/84 and 21/70

18/84 + 21/70 is 18/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 70 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 84 × 5 = 420,
    18/84 = 18 × 5/84 × 5 = 90/420
  3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
    21/70 = 21 × 6/70 × 6 = 126/420
  4. Add the two like fractions:
    90/420 + 126/420 = 90 + 126/420 = 216/420
  5. 216/420 simplified gives 18/35
  6. So, 18/84 + 21/70 = 18/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com