Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 1/45 and 70/21

1st number: 1/45, 2nd number: 3 7/21

1/45 + 70/21 is 151/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 21 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 45 × 7 = 315,
    1/45 = 1 × 7/45 × 7 = 7/315
  3. Likewise, for the 2nd fraction, since 21 × 15 = 315,
    70/21 = 70 × 15/21 × 15 = 1050/315
  4. Add the two like fractions:
    7/315 + 1050/315 = 7 + 1050/315 = 1057/315
  5. 1057/315 simplified gives 151/45
  6. So, 1/45 + 70/21 = 151/45
    In mixed form: 316/45

MathStep (Works offline)

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

Related:

© everydaycalculation.com