Answers

Add 90/42 and 42/45

1^st number: 2 6/42, 2^nd number: 42/45

90/42 + 42/45 is 323/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 45 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   90/42 = 90 × 15/42 × 15 = 1350/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   42/45 = 42 × 14/45 × 14 = 588/630
4. Add the two like fractions:
   1350/630 + 588/630 = 1350 + 588/630 = 1938/630
5. 1938/630 simplified gives 323/105
6. So, 90/42 + 42/45 = 323/105
   In mixed form: 38/105

MathStep (Works offline)

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

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

Add Fractions Calculator