Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 42/7 and 21/45

1st number: 6 0/7, 2nd number: 21/45

42/7 + 21/45 is 97/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 7 × 45 = 315,
    42/7 = 42 × 45/7 × 45 = 1890/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    21/45 = 21 × 7/45 × 7 = 147/315
  4. Add the two like fractions:
    1890/315 + 147/315 = 1890 + 147/315 = 2037/315
  5. 2037/315 simplified gives 97/15
  6. So, 42/7 + 21/45 = 97/15
    In mixed form: 67/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com