How do u work out what decimal is equal to 6/20

There are 3 ways(or more) of solving this..
The first way:
1) Since 20 is a multiple of 100, you multiply The numerator and denominator by 5: 6/20*5/5= 30/100
2) You should know 30/100 is 0.30 or 0.3
The second way:
1) Simplify 6/20 and you should get 3/10: 6/20 divided by 2/2= 3/10
2) You should know that 3/10 is 0.3
The third way:
1) Divide 6 and 20 and you should get 0.3
You could use whatever way you want or do whatever helps you best. Hope this helps  :)