Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 72/45 and 90/20

1st number: 1 27/45, 2nd number: 4 10/20

72/45 + 90/20 is 61/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 45 × 4 = 180,
    72/45 = 72 × 4/45 × 4 = 288/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    90/20 = 90 × 9/20 × 9 = 810/180
  4. Add the two like fractions:
    288/180 + 810/180 = 288 + 810/180 = 1098/180
  5. 1098/180 simplified gives 61/10
  6. So, 72/45 + 90/20 = 61/10
    In mixed form: 61/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com