What's the easiest way to calculate the percentage of a number?
Answers
Answer:
to calculate the percentage u should write the obtained result then divide it by total result and multiply by 100
Step-by-step explanation:
HOPE it is CLEAR to u
Step-by-step explanation:
Some Easy Percentages to Remember
If you can commit the percentage list below to memory, you will be able to calculate a wide variety of percentages without a calculator.
50 percent means half. To calculate 50 percent of a number, simply divide it by 2. For example, 50 percent of 26 is 26 divided by 2, or 13.
25 percent means one fourth. To calculate 25 percent of a number, simply divide it by 4. For example, 25 percent of 12 is 12 divided by 4, or 3.
10 percent means one tenth. To calculate 10 percent of a number, simply divide it by 10 or move the decimal point one place to the left. For example, 10 percent of 230 is 230 divided by 10, or 23.
5 percent is one half of 10 percent. To calculate 5 percent of a number, simply divide 10 percent of the number by 2. For example, 5 percent of 230 is 23 divided by 2, or 11.5.
How to Do Percentages In Your Head
So how much is 15 percent of 210? You can use the four key percentages you memorized to figure this out. Consider that 15 percent is 5 percent added to 10 percent. Since 10 percent of 210 is 21, and 5 percent is half that, or 10.5, then 15 percent is 21 added to 10.5, or 31.5.
How about 75 percent of 440? Here you can figure that 75 percent is 50 percent added to 25 percent. Since 50 percent of 440 is half that, or 220, and 25 percent of 440 is one fourth, or 110, then 75 percent is 220 added to 110, or 330.
In this way you can combine 5 percent, 10 percent, 25 percent, and 50 percent to calculate a wide variety of percentages in your head. If you need to calculate a percentage that is not a multiple of 5, you can use this technique to estimate the answer very closely.
How to Compute Percentage Greater Than 100 Percent
To calculate a percentage greater than 100 percent, simply move the decimal of the percent two spaces to the left and use the answer to multiply the number in question. You can do this to figure out what is 350 percent of 20. Moving the decimal of the percent two spaces to the left gives you 3.5. Multiplying 20 by 3.5 then gives you the answer, which is 70.
How to Calculate a 10 Percent Discount
One of the easiest ways to determine a 10 percent discount is to divide the total sale price by 10 and then subtract that from the price. You can calculate this discount in your head. For a 20 percent discount, divide by ten and multiply the result by two. Or you can use one of two other methods for calculating the 10 percent discount without needing a calculator.
Figuring the Discount
While 10 percent of any amount is the amount multiplied by 0.1, an easier way to calculate 10 percent is to divide the amount by 10. So, 10 percent of $18.40, divided by 10, equates to $1.84. To figure the total cost with the 10 percent discount, take $18.40 and subtract $1.84 which equates to a total sales price of $16.56.
Notice that 10 percent of $18.40 can also be found without doing any math at all. Simply move the decimal point one digit to the left to yield the 10 percent discount. This is applicable to any value. Ten percent of $1,369.98 is $136.998, or roughly $137, for a discounted price of $1,369.98 minus $137, or $1,232.98.