Answers

Add 90/9 and 45/12

1^st number: 10 0/9, 2^nd number: 3 9/12

90/9 + 45/12 is 55/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 12 is 36
2. For the 1st fraction, since 9 × 4 = 36,
   90/9 = 90 × 4/9 × 4 = 360/36
3. Likewise, for the 2nd fraction, since 12 × 3 = 36,
   45/12 = 45 × 3/12 × 3 = 135/36
4. Add the two fractions:
   360/36 + 135/36 = 360 + 135/36 = 495/36
5. 495/36 simplified gives 55/4
6. So, 90/9 + 45/12 = 55/4
   In mixed form: 133/4

MathStep (Works offline)

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

Related: ⁹⁰/₉+⁹⁰/₁₂ ⁹⁰/₁₈+⁴⁵/₁₂ ⁹⁰/₉+⁴⁵/₂₄ ⁹⁰/₂₇+⁴⁵/₁₂ ⁹⁰/₉+⁴⁵/₃₆ ⁹⁰/₄₅+⁴⁵/₁₂ ⁹⁰/₉+⁴⁵/₆₀ ⁹⁰/₆₃+⁴⁵/₁₂ ⁹⁰/₉+⁴⁵/₈₄

Add Fractions Calculator