Las Vegas Review-Journal – Lottery systems provider Scientific Games received tentative approval Wednesday from the Gaming Control Board to purchase slot machine manufacturer WMS Industries for $1.5 billion. The Nevada Gaming Commission will have a final say on the matter on Sept. 26. Scientific Games is headquartered in New York. It’s largest shareholder is financier Ronald Perelman, who is ranked 26th on the Forbes 400 list of billionaires with a net worth of $12.2 billion. Perelman owns 38 percent of Scientific Games. Perelman, 70, attended the Gaming Control Board meeting but did not take part in the formal presentation. Gaming…