Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 1/21 and 7/8

1/21 + 7/8 is 155/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    1/21 = 1 × 8/21 × 8 = 8/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    7/8 = 7 × 21/8 × 21 = 147/168
  4. Add the two like fractions:
    8/168 + 147/168 = 8 + 147/168 = 155/168
  5. So, 1/21 + 7/8 = 155/168

MathStep (Works offline)

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

Related:

© everydaycalculation.com