![]() When solving a more complex percentage or ratio problem, write the problem down in words and numbers and work through one step at a time. The live fuel moisture of your sample is 90.4%. Step 2.Divide the difference by the dry weight and multiply by 100 to find the value as a percent. Step 1. Subtract the dry weight from the wet weight. After the sample is dried in an oven, it weighs 198 grams. This value is the result of subtracting the dry weight of the fuel from the total (wet) weight and dividing by the dry weight.Įxample 3 - A fuel sample collected in the field weighs 377 grams. For instance, from the figure, we observe that completely cured fuels have a live fuel moisture of less than 30%. Live fuel moisture can be estimated using the values in the figure below, which provides moisture percentages for fuels at different stages of vegetative development. Because this process is time-consuming and cannot be completed in the field, fire considerations are usually satisfied with a good estimate. Live fuel moisture can be measured using oven drying and weighing procedures. One of these applications is estimating live fuel moisture. ![]() Percentages are useful for a number of fire science applications. ![]() For instance, if 92 out of 100 firefighters have completed the FireFighter Math course, the ratio of firefighters completing the course is 92:100, and the percentage is written as 92%.Įxample 2 - Write four notations for 56.8%.ĥ6.8% = 0.568 (Note that performing this calculation results in moving the decimal two places to the left because there are two zeros in 100.) The symbol is used to show that a number is a percentage. When you are using percentages, the whole is considered to be made up of a hundred equal parts. In mathematics, percentages are used like fractions and decimals, as ways to describe parts of a whole. Percent (%) is a value corresponding to how many out of a hundred (per hundred). The term ‘per cent’ means ‘out of a hundred’. The ratio of engines in the Mara Bella versus Baldy districts is 6:5 or 6/5.Ī percentage is another way of describing a ratio with respect to 100. What is the ratio of engines in the Mara Bella versus the Baldy districts? Any fraction, for instance, 1/20, can also be written as a ratio: 1:20Įxample 1 - The Mara Bella District has 6 engines. The value of a ratio is the division of the first number by the second number. Ratios can be written either as a fraction, 1/2, or in ratio notation, 1:2. A ratio is a proportional relationship of one value to another, e.g., the ratio of gas to oil in chain saw mix.
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