Direct Answer
Net Cash Outflows form the denominator of the LCR formula and are calculated as total expected cash outflows minus total expected cash inflows over the next 30 calendar days
The regulation imposes a mathematical ceiling: a bank can only offset its outflows with inflows up to a maximum of 75 percent. Thus, Net Cash Outflows will always be at least 25 percent of total expected cash outflows, meaning the bank must hold HQLA equal to at least this 25 percent base