Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 42/56 and 90/21

1st number: 42/56, 2nd number: 4 6/21

42/56 + 90/21 is 141/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 21 is 168
  2. For the 1st fraction, since 56 × 3 = 168,
    42/56 = 42 × 3/56 × 3 = 126/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    90/21 = 90 × 8/21 × 8 = 720/168
  4. Add the two fractions:
    126/168 + 720/168 = 126 + 720/168 = 846/168
  5. 846/168 simplified gives 141/28
  6. So, 42/56 + 90/21 = 141/28
    In mixed form: 51/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com