Answers

Add 75/20 and 90/18

1^st number: 3 15/20, 2^nd number: 5 0/18

75/20 + 90/18 is 35/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 18 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   75/20 = 75 × 9/20 × 9 = 675/180
3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
   90/18 = 90 × 10/18 × 10 = 900/180
4. Add the two like fractions:
   675/180 + 900/180 = 675 + 900/180 = 1575/180
5. 1575/180 simplified gives 35/4
6. So, 75/20 + 90/18 = 35/4
   In mixed form: 83/4

MathStep (Works offline)

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

Related: ⁷⁵/₄₀+⁹⁰/₁₈ ⁷⁵/₂₀+⁹⁰/₃₆ ⁷⁵/₆₀+⁹⁰/₁₈ ⁷⁵/₂₀+⁹⁰/₅₄

Add Fractions Calculator