Name the total number of year to april for ebit being 24.5
CREATE TABLE "senior_plc_financial_results" (
  "year_to_april" real,
  "revenue_million" text,
  "ebit_m" text,
  "net_profit_m" text,
  "earnings_per_share_p" text
);
SELECT COUNT("year_to_april") FROM "senior_plc_financial_results" WHERE "ebit_m"='24.5';