Answers

Add 20/90 and 75/64

1^st number: 20/90, 2^nd number: 1 11/64

20/90 + 75/64 is 803/576.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 64 is 2880
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2880
2. For the 1st fraction, since 90 × 32 = 2880,
   20/90 = 20 × 32/90 × 32 = 640/2880
3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
   75/64 = 75 × 45/64 × 45 = 3375/2880
4. Add the two like fractions:
   640/2880 + 3375/2880 = 640 + 3375/2880 = 4015/2880
5. 4015/2880 simplified gives 803/576
6. So, 20/90 + 75/64 = 803/576
   In mixed form: 1227/576

MathStep (Works offline)

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

Related: ⁴⁰/₉₀+⁷⁵/₆₄ ⁶⁰/₉₀+⁷⁵/₆₄

Add Fractions Calculator