What is the Lowest value in Against with Wins % of 50.4% and Losses less than 20?
CREATE TABLE "overall" (
  "team" text,
  "matches" real,
  "wins" real,
  "wins_pct" text,
  "draws" real,
  "draws_pct" text,
  "losses" real,
  "losses_pct" text,
  "against" real
);
SELECT MIN("against") FROM "overall" WHERE "wins_pct"='50.4%' AND "losses"<20;