Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 7/2 and 21/90

1st number: 3 1/2, 2nd number: 21/90

7/2 + 21/90 is 56/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 90 is 90
  2. For the 1st fraction, since 2 × 45 = 90,
    7/2 = 7 × 45/2 × 45 = 315/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    21/90 = 21 × 1/90 × 1 = 21/90
  4. Add the two fractions:
    315/90 + 21/90 = 315 + 21/90 = 336/90
  5. After reducing the fraction, the answer is 56/15
  6. In mixed form: 311/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com