How to write joules per metre squared per second

[autodidude]

This was a question I had in another post, but the main topic was on a similar but different issue...

If I had the dimensions joules per metre squared per second (e.g. like for a solar panel), how would I write that?

I've been told
\frac{Js}{m^2}

But I get \frac{J}{m^2s}

Why is it this:
\frac{J}{1} \times \frac{s}{m^2}
And not:
\frac{J}{m^2} \times \frac{1}{s}

I'm grouping joules over metre squared together whereas everyone I've talked to does the first one - why? And am I wrong for saying 'per metre per second'? Should time come first? What is the convention here?

Thank you

 

[JHamm]

If you mean that each second you are receiving 'x' joules of energy over each square meter then \frac{J}{m^2 s} are the correct units.

 

[technician]

I agree with JHamm... you have it correct J/m^2s not Js/m^2
It means Watts per square metre which makes sense when talking about solar panels.