Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/7 and 7/90

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

21/7 + 7/90 is 277/90.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 7 × 90 = 630,
    21/7 = 21 × 90/7 × 90 = 1890/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    7/90 = 7 × 7/90 × 7 = 49/630
  4. Add the two like fractions:
    1890/630 + 49/630 = 1890 + 49/630 = 1939/630
  5. 1939/630 simplified gives 277/90
  6. So, 21/7 + 7/90 = 277/90
    In mixed form: 37/90

MathStep (Works offline)

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

Related:

© everydaycalculation.com