Answers

Add 45/42 and 90/56

1^st number: 1 3/42, 2^nd number: 1 34/56

45/42 + 90/56 is 75/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 56 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 42 × 4 = 168,
   45/42 = 45 × 4/42 × 4 = 180/168
3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
   90/56 = 90 × 3/56 × 3 = 270/168
4. Add the two like fractions:
   180/168 + 270/168 = 180 + 270/168 = 450/168
5. 450/168 simplified gives 75/28
6. So, 45/42 + 90/56 = 75/28
   In mixed form: 219/28

MathStep (Works offline)

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

Related: ⁹⁰/₄₂+⁹⁰/₅₆ ⁴⁵/₈₄+⁹⁰/₅₆

Add Fractions Calculator