Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/30 and 30/27

1st number: 21/30, 2nd number: 1 3/27

21/30 + 30/27 is 163/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 27 is 270
  2. For the 1st fraction, since 30 × 9 = 270,
    21/30 = 21 × 9/30 × 9 = 189/270
  3. Likewise, for the 2nd fraction, since 27 × 10 = 270,
    30/27 = 30 × 10/27 × 10 = 300/270
  4. Add the two fractions:
    189/270 + 300/270 = 189 + 300/270 = 489/270
  5. 489/270 simplified gives 163/90
  6. So, 21/30 + 30/27 = 163/90
    In mixed form: 173/90

MathStep (Works offline)

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

Related:

© everydaycalculation.com