Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 1/42 and 9/90

1/42 + 9/90 is 13/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    1/42 = 1 × 15/42 × 15 = 15/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    9/90 = 9 × 7/90 × 7 = 63/630
  4. Add the two fractions:
    15/630 + 63/630 = 15 + 63/630 = 78/630
  5. 78/630 simplified gives 13/105
  6. So, 1/42 + 9/90 = 13/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com