Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/60 and 21/8

1st number: 18/60, 2nd number: 2 5/8

18/60 + 21/8 is 117/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 8 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 60 × 2 = 120,
    18/60 = 18 × 2/60 × 2 = 36/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    21/8 = 21 × 15/8 × 15 = 315/120
  4. Add the two like fractions:
    36/120 + 315/120 = 36 + 315/120 = 351/120
  5. 351/120 simplified gives 117/40
  6. So, 18/60 + 21/8 = 117/40
    In mixed form: 237/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com