Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 63/42 and 12/40

1st number: 1 21/42, 2nd number: 12/40

63/42 + 12/40 is 9/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 42 × 20 = 840,
    63/42 = 63 × 20/42 × 20 = 1260/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    12/40 = 12 × 21/40 × 21 = 252/840
  4. Add the two like fractions:
    1260/840 + 252/840 = 1260 + 252/840 = 1512/840
  5. 1512/840 simplified gives 9/5
  6. So, 63/42 + 12/40 = 9/5
    In mixed form: 14/5

MathStep (Works offline)

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

Related:

© everydaycalculation.com