PowerPoint presentations (5 short ones) enhancement and formatting

I have 5 PowerPoint presentations which I need formatting urgently as my PA is not available and can't do them. I use PowerPoint 2013 and have created the basic presentations. The length of the presentations is as follows:-
7 slides, 32 slides, 11 slides, 10 slides and 29 slides. They will be in the backdrop of some on-line training videos I am making so they need to look good. They don't need to be too complicated in terms of lots of whizzy things it is for a business audience and they just need to look professional.