Yes thank u teehee
.................... x
        
                    
             
        
        
        
The decimal point is placed after two digits starting from the end. For each decimal place, we can write the number divided by 100. 
21.12 can be written as  .
.
Divide the numerator and denominator by 2:

The numerator and denominator can be divided by 2 again:

There is no other common factor between numerator and denominator other than 1. Hence, it is the reduced form.
 
        
                    
             
        
        
        
3. Sand has a low specific heat compared to air