What percent of # is #?
In 2021, there were about 14,500 deadly automobile accidents. About 5,075 were a result of
drunk driving accidents. Approximately what percent of the deadly automobile accidents
were a result of drunk driving accidents?
5,075 / 14,500 = 0.35
0.35 x 100 = 35%
What is % of #?
A department tested 25 ground ladders, and 20% failed inspection, how many ladders failed inspection?
20% -> 0.2
0.2 x 25 = 5
% of what is #?
An SCBA low air alarm sounds at 25% remaining air, which is 16.25 cubic feet of air remaining. What is the total amount of air in this SCBA cylinder?
25% -> 0.25
16.25 / 0.25 = 65
1625. / 25. = 65
There is a trailer that carries foam concentrate in a large rectangular product container. It measures 2 meters long by 1.5 meters wide by 1 meter high. What is the volume of concentrate in liters?
2 x 1.5 x 1 = 3 cubic meters
1 cubic meter = 1,000 litres
3 x 1,000 = 3,000 litres
There are 3,000 litres of foam concentrate carried on the foam trailer.
Rate and Time
A pumper operating 1 hose line, flowing 360 litres per minute, for 10 minutes. The foam concentrate dilution rate is 3%. How much foam concentrate is required to sustain this operation?
360L x 10 minutes = 3,600 litres
3% to decimal = 0.03
3,600 x 0.03 = 108
To operate the hose line for 10 minutes, would require 108 litres of foam concentrate.
Distance and Time
If a fire engine is traveling 45 km/h for 18 minutes, how far will it travel? (Distance = Rate x Time)
We first need to know how many kilometers per minute. We know the speed is per hour, so 1 hour is 60 minutes, and the speed is 45 km in 60 minutes.
45 / 60 = 0.75km per minute
Then multiply how many minutes the fire engine is driving for:
18 minutes x 0.75km per minute = 13.5km
Calculate Percentage help here.