Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 90/7 and 21/30

1st number: 12 6/7, 2nd number: 21/30

90/7 + 21/30 is 949/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 7 × 30 = 210,
    90/7 = 90 × 30/7 × 30 = 2700/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    21/30 = 21 × 7/30 × 7 = 147/210
  4. Add the two like fractions:
    2700/210 + 147/210 = 2700 + 147/210 = 2847/210
  5. 2847/210 simplified gives 949/70
  6. So, 90/7 + 21/30 = 949/70
    In mixed form: 1339/70

MathStep (Works offline)

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

Related:

© everydaycalculation.com