Question

half of some number times 5 divided by another number.

I have to put this into an expression.

1/2 * a * 5 / b

or

.5 * a * 5 / b

Is this correct?

Answer 1

both of your expressions are correct.

you could use brackets for the multiplication

(1/2)(a)(5)/b

Answer 2

Thanks. Brackets does make it look more simple and clean.