Ответ:

  1. \(0{,}2=\frac{2}{10}=\frac{1}{5}\).
  2. \(0{,}88=\frac{88}{100}=\frac{22}{25}\).
  3. \(0{,}64=\frac{64}{100}=\frac{16}{25}\).
  4. \(0{,}78=\frac{78}{100}=\frac{39}{50}\).
  5. \(0{,}256=\frac{256}{1000}=\frac{32}{125}\).
  6. \(0{,}326=\frac{326}{1000}=\frac{163}{500}\).

Ответ: 1) 1/5; 2) 22/25; 3) 16/25; 4) 39/50; 5) 32/125; 6) 163/500.