Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/21 and 63/40

1st number: 7/21, 2nd number: 1 23/40

7/21 + 63/40 is 229/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 21 × 40 = 840,
    7/21 = 7 × 40/21 × 40 = 280/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    63/40 = 63 × 21/40 × 21 = 1323/840
  4. Add the two like fractions:
    280/840 + 1323/840 = 280 + 1323/840 = 1603/840
  5. 1603/840 simplified gives 229/120
  6. So, 7/21 + 63/40 = 229/120
    In mixed form: 1109/120

MathStep (Works offline)

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

Related:

© everydaycalculation.com