Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 30/63 and 21/20

1st number: 30/63, 2nd number: 1 1/20

30/63 + 21/20 is 641/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 20 is 1260
  2. For the 1st fraction, since 63 × 20 = 1260,
    30/63 = 30 × 20/63 × 20 = 600/1260
  3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
    21/20 = 21 × 63/20 × 63 = 1323/1260
  4. Add the two fractions:
    600/1260 + 1323/1260 = 600 + 1323/1260 = 1923/1260
  5. 1923/1260 simplified gives 641/420
  6. So, 30/63 + 21/20 = 641/420
    In mixed form: 1221/420

MathStep (Works offline)

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

Related:

© everydaycalculation.com