Answers

Add 90/18 and 72/16

1^st number: 5 0/18, 2^nd number: 4 8/16

90/18 + 72/16 is 19/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 16 is 144
   
   Next, find the equivalent fraction of both fractional numbers with denominator 144
2. For the 1st fraction, since 18 × 8 = 144,
   90/18 = 90 × 8/18 × 8 = 720/144
3. Likewise, for the 2nd fraction, since 16 × 9 = 144,
   72/16 = 72 × 9/16 × 9 = 648/144
4. Add the two like fractions:
   720/144 + 648/144 = 720 + 648/144 = 1368/144
5. 1368/144 simplified gives 19/2
6. So, 90/18 + 72/16 = 19/2
   In mixed form: 91/2

MathStep (Works offline)

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

Related: ⁹⁰/₃₆+⁷²/₁₆ ⁹⁰/₁₈+⁷²/₃₂ ⁹⁰/₅₄+⁷²/₁₆ ⁹⁰/₁₈+⁷²/₄₈ ⁹⁰/₁₈+⁷²/₈₀

Add Fractions Calculator