how to change a decimal to a fraction?

That will not work for all decimals MG

Have a look at the instructions here

http://www.mathsisfun.com/converting-decimals-fractions.html

Times by 100 then put it over it, then simplify.

 

E.g. 0.20

 

0.20*100= 20

 

20/100 if the fraction.

 

Simplify = 1/20

 

for 3 decimal place you times by 1000

 

 

0.625/1

*1000

625/1000

Simplify

5/8