Answers

Add 45/42 and 90/28

1^st number: 1 3/42, 2^nd number: 3 6/28

45/42 + 90/28 is 30/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 28 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   45/42 = 45 × 2/42 × 2 = 90/84
3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
   90/28 = 90 × 3/28 × 3 = 270/84
4. Add the two like fractions:
   90/84 + 270/84 = 90 + 270/84 = 360/84
5. 360/84 simplified gives 30/7
6. So, 45/42 + 90/28 = 30/7
   In mixed form: 42/7

MathStep (Works offline)

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

Related: ⁹⁰/₄₂+⁹⁰/₂₈ ⁴⁵/₈₄+⁹⁰/₂₈ ⁴⁵/₄₂+⁹⁰/₅₆ ⁴⁵/₄₂+⁹⁰/₈₄

Add Fractions Calculator