The phrase "cent probability" means something that is very likely to occur or is almost certain to happen. It expresses a high level of confidence in the outcome. Full definition
A company, for example, can record revenue if management believes there is a 50.001 per cent probability of collecting the cash. (canadianbusiness.com)
A company, for example, can record revenue if management believes there is a 50.001 per cent probability of collecting the cash. (moneysense.ca)
From the Climate Change Authority, of which I was a Member until recently, here's a set of emissions trajectories consistent with a 67 per cent probability of limiting warming to 2 degrees. (johnquiggin.com)