Question

20) Explain what 25 ÷ 0.2 means

Answer 1

It means that you're dividing 25 from 0.2 

The symbol  ( ÷ )in this problem you used  is called "division symbol" (if in case you didn't know)

So, basically you $HAVE$ $TO$ divide 

Answer 2

It means 25 divided by 0.2