A percent is simply a proportion out of 100.
use the rule: is / of = percent / 100reword the question in your head What is 16 percent of 90?(percent = 16) (of = 90) is is the unknown pick a variable -- xx / 90 = 16 / 100 now solve for xx = 14.4
There is no "should" or "should not". The depends on the question that you are trying to answer.
A simple tool to remember is: IS over OF equals percent over 100.If we put this into a proportion, we get:IS/OF = percent/100.Just put all percent problems into this format, and solve the proportion.Example: 12.5 IS what percent OF 75?Or,12.5 IS | what percent | OF 75?Just put these numbers into the proportion: (We will use x for the percent, as that is the unknown we are solving for)12.5/75 = x/100.Then solve by cross multiplying:75x = 1250.Then divide by 75:x = 1250/75,x = 16 2/3 %
To find a percent.
The percent proportion can be used to solve real-world problems by setting up a ratio that compares a part to the whole, expressed as a percentage. For example, if you want to find out what percentage of a class passed an exam, you can set up the equation ( \frac{\text{part}}{\text{whole}} = \frac{\text{percent}}{100} ). This allows you to easily calculate unknown values, such as the percentage of sales tax on an item or the proportion of a budget allocated to different expenses. By applying this formula, you can make informed decisions based on quantitative data.
100
use the rule: is / of = percent / 100reword the question in your head What is 16 percent of 90?(percent = 16) (of = 90) is is the unknown pick a variable -- xx / 90 = 16 / 100 now solve for xx = 14.4
There is no "should" or "should not". The depends on the question that you are trying to answer.
A simple tool to remember is: IS over OF equals percent over 100.If we put this into a proportion, we get:IS/OF = percent/100.Just put all percent problems into this format, and solve the proportion.Example: 12.5 IS what percent OF 75?Or,12.5 IS | what percent | OF 75?Just put these numbers into the proportion: (We will use x for the percent, as that is the unknown we are solving for)12.5/75 = x/100.Then solve by cross multiplying:75x = 1250.Then divide by 75:x = 1250/75,x = 16 2/3 %
Because you simply set it up in a proportion box, for example if you have the fraction 4/8 you put the 4 on top of the 8 and 100 next to the 8 because with percents you always use 100. then solve,
To find a percent.
217
32
http://www.mathgoodies.com/lessons/percent/proportions.html this website helped me ! =]
Use a proportion: x/74 = 5.5/100 cross multiply 100x =74 * 5.5 100x = 407 Divide both sides by 100 x = 4.07
How do you use division to solve a multiplication equation?Answer this question…
It might be easier to use the percent equation rather than the percent proportion when you are multiplying and dividing.