Percentage Formula

The percentage formula is calculated by multiplying the numeric value relations 100. For example:

To find the percentage of 50 apples from 1250 apples, first calculate the ratio 50/1250 = 0.04, and then multiply by 100 to get the 4%.

Percentage Calculator value can be found by multiplying the first, so this example 50 would have to be multiplied by 100 to give 5000, and this result is divided into 4-1250%.

To calculate the percentage, convert interest in fractions of 100, or decimals, and multiply them. For example, 50% 40%: (50/100) x (40/100) = 0.50 h = 0.40 0.20 = 20/100 = 20%.

It is not properly divided into 100 and use a percent sign, at the same time. (For example, 25% = 25/100 = 0.25, and not 25%/100, actually (25/100)/100 = 0.0025).

The easiest way to calculate what percentage (10% discount + 5%):

10. The easiest way to calculate what percentage (10% discount + 5%)

For example, if there are “10% + 5% discount”, total discount 15% but not

For example, if a department store there is a 10% discount + 5% total discount 15%

Whenever we talk about percentage formula, it is important to point out that it is relatively, that is something common that corresponds to 100%. The next task illustrates this point.

In the well-known 60% of all college students are women, and 10% of all the students of a speciality computer science. If 5% of the students of a speciality computer science, what percentage of computer science majors are women?

We asked to calculate the ratio of female computer science majors for all disciplines of computer science. We know that 60% of all students are female, and among them 5% are computer science specialty, so we conclude that (60/100) x (5/100) = 3/100 or 3% of the total number of students are female computer science majors. Dividing this 10% of all students who are speciality computer science, we arrive at the answer: 3%/10% = 30/100 or 30% of all computer science majors are women.

This example is closely related to the concept of conditional probability.

Some other examples of percent change:

An increase of 800% means the final amount in 9 times the original (100% + 800% = 900% = 9 times more).

Reduction of 100% means the final amount is zero (100%-100% = 0%).

It is important to understand that How to calculate percentage?, as they have already been discussed here, do not add in the usual way, if applied consistently. For example, if a 10% price increase was considered earlier (at $200 item, boosting its price to $220) is accompanied by a 10% decline in prices (down by $22), the final price would be $198, not the original price of $200. Another common mistake to think that the work on 50% faster funds from 50% less time to complete the task. For this reason, the 100% faster means that twice as fast, so in half the cases.

In the case of interest rates, it is common practice to specify the percent change differently. If the interest rate rises from 10% to 15%, this is typical, for example, say: “the interest rate increased by 5%, rather than the 50% that would be correct, if measured as a percentage of the initial velocity (i.e., from 0.10 to 0.15 at 50%). this ambiguity can be avoided by using the term” percentage points “.

In the preceding example, the interest rate increased by 5 percentage points “from 10% to 15%. If the speed falls, at 5 percentage points, he will return to the original rate of 10%, as expected.