8.8 Probability and Number of Ignitions 
Probability & Number of IgnitionsProbability is the chance that an event will happen and is expressed in terms of percent, or per 100. For example, if there is a 40 percent chance of a spot fire starting, that means that out of 100 glowing embers that fly off, 40 embers will likely start spot fires, and 60 will not. Percent is calculated by changing the percent into a fraction by dividing by 100, then multiplying by the total number of possible situations. Expect 72 ignitions out of 90 glowing firebrands.
