Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/40 and 15/60

21/40 + 15/60 is 31/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 60 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    21/40 = 21 × 3/40 × 3 = 63/120
  3. Likewise, for the 2nd fraction, since 60 × 2 = 120,
    15/60 = 15 × 2/60 × 2 = 30/120
  4. Add the two like fractions:
    63/120 + 30/120 = 63 + 30/120 = 93/120
  5. 93/120 simplified gives 31/40
  6. So, 21/40 + 15/60 = 31/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com