Answers

Add 90/12 and 42/90

1^st number: 7 6/12, 2^nd number: 42/90

90/12 + 42/90 is 239/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 12 × 15 = 180,
   90/12 = 90 × 15/12 × 15 = 1350/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   42/90 = 42 × 2/90 × 2 = 84/180
4. Add the two like fractions:
   1350/180 + 84/180 = 1350 + 84/180 = 1434/180
5. 1434/180 simplified gives 239/30
6. So, 90/12 + 42/90 = 239/30
   In mixed form: 729/30

MathStep (Works offline)

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

Related: ⁹⁰/₁₂+⁸⁴/₉₀ ⁹⁰/₂₄+⁴²/₉₀ ⁹⁰/₃₆+⁴²/₉₀ ⁹⁰/₆₀+⁴²/₉₀ ⁹⁰/₈₄+⁴²/₉₀

Add Fractions Calculator