Answers

Add 90/20 and 48/64

1^st number: 4 10/20, 2^nd number: 48/64

90/20 + 48/64 is 21/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 20 × 16 = 320,
   90/20 = 90 × 16/20 × 16 = 1440/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   48/64 = 48 × 5/64 × 5 = 240/320
4. Add the two like fractions:
   1440/320 + 240/320 = 1440 + 240/320 = 1680/320
5. 1680/320 simplified gives 21/4
6. So, 90/20 + 48/64 = 21/4
   In mixed form: 51/4

MathStep (Works offline)

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

Related: ⁹⁰/₂₀+⁹⁶/₆₄ ⁹⁰/₄₀+⁴⁸/₆₄ ⁹⁰/₆₀+⁴⁸/₆₄

Add Fractions Calculator