Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/72 and 18/70

21/72 + 18/70 is 461/840.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 70 is 2520

    Next, find the equivalent fraction of both fractional numbers with denominator 2520
  2. For the 1st fraction, since 72 × 35 = 2520,
    21/72 = 21 × 35/72 × 35 = 735/2520
  3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
    18/70 = 18 × 36/70 × 36 = 648/2520
  4. Add the two like fractions:
    735/2520 + 648/2520 = 735 + 648/2520 = 1383/2520
  5. 1383/2520 simplified gives 461/840
  6. So, 21/72 + 18/70 = 461/840

MathStep (Works offline)

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

Related:

© everydaycalculation.com