Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 21/75 and 90/81

1st number: 21/75, 2nd number: 1 9/81

21/75 + 90/81 is 313/225.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 81 is 2025
  2. For the 1st fraction, since 75 × 27 = 2025,
    21/75 = 21 × 27/75 × 27 = 567/2025
  3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
    90/81 = 90 × 25/81 × 25 = 2250/2025
  4. Add the two fractions:
    567/2025 + 2250/2025 = 567 + 2250/2025 = 2817/2025
  5. After reducing the fraction, the answer is 313/225
  6. In mixed form: 188/225

MathStep (Works offline)

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

Related:

© everydaycalculation.com