Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 70/42 and 21/45

1st number: 1 28/42, 2nd number: 21/45

70/42 + 21/45 is 32/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 45 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    70/42 = 70 × 15/42 × 15 = 1050/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    21/45 = 21 × 14/45 × 14 = 294/630
  4. Add the two fractions:
    1050/630 + 294/630 = 1050 + 294/630 = 1344/630
  5. After reducing the fraction, the answer is 32/15
  6. In mixed form: 22/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com