Factoring out coefficients

Question

The expression 0.8w+3.6 factored is?

Answer 1

4 could be considered a common factor

0.8w + 3.6 =

4(0.2w + 0.9)

or you could call 0.4 the common factor

=0.4(2w+9)

= (2/5)(2w+9), if you want to eliminate decimals. 0.4=4/10=2/5