Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 9/90 and 21/7

1st number: 9/90, 2nd number: 3 0/7

9/90 + 21/7 is 31/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 7 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    9/90 = 9 × 7/90 × 7 = 63/630
  3. Likewise, for the 2nd fraction, since 7 × 90 = 630,
    21/7 = 21 × 90/7 × 90 = 1890/630
  4. Add the two like fractions:
    63/630 + 1890/630 = 63 + 1890/630 = 1953/630
  5. 1953/630 simplified gives 31/10
  6. So, 9/90 + 21/7 = 31/10
    In mixed form: 31/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com