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Q: What is a number so that 81 is 90 percent of that number?

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First, we can truncate the .00 off of the 90.00 to just make 90 for simplicity. Next, we take .10*90, which is 9. Subtract that from your original number, 90. 90-9=81. There is another way to do this problem. First, we have 100 percent, or 1. Next, we subtract 10 percent from that, or .1. 1-.1=.9, so we multiply .9*90=81.

9 X 9 is 81 the other answers are incorrect use a calculator and it also sas 81

200% of a number is 90, so 100% of a nubmer is 45, so 45 is 80% 0f a number therfore a number is 45/80*100=225/4

Percent is hundredths. So 81% =0.81

20% of 450 is 90 So 80% of 450 will be 360

10 percent of 90 is 9 so 30 percent will be 9 times 3 which is 27

100% - 10% = 90% so you multiply the number by 0.9

Answer 300 ---- Here is why: This is the same as asking .3x=90 so the number is 90/.3 =300 Note, 90/.3 is 90 divided by 3/10 which is 90x10=900 divided by 3.

33 and 1/3 % is equivalent to 1/3. So multiplying anything that is that percentage of another number by 3, will give you the full number. In this case you get: Your answer is 81 27 * 3 = 81

I would type it with the percent sign, like so: 90%

The prime numbers between 80 and 90 are 83 and 89.

00 600 or so

58% is equivalent to 58/100. So 58% of 90 = 90 x 58/100 = 52.2

40% means 40/100, which equals 0.40, so... 0.40 X 90 = 36

consider the num to be "X" so (90/100)*x = 207 by transposing we get x=(207*100)/90 x=230

Let M be the number we seek. Now .9M-=18so M=18/.9=20

One-tenth in percent form is 10%. A percent is different from a percentage, so I hope you were asking for the percent equivalent of one-tenth. A percentage is an amount obtained by multiplying the percent by the number of which you are taking a percent. If you were taking 10% of 90, the percentage would be 10% x 90 = 9.

To go from percent to decimal, divide by 100. So, 90%/100 is 0.90.

Multiples are formed by multiplying a number by successive counting numbers. The multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 and so on.

34 =81 so I think you mean 3

9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108

3.5% is written 0.035, so multiply that with your original number:0.035*81 = 2.835

Usually, when you see the word "of" in a math question it indicates multiplication of some kind so the question "What is 85 percent of 90?" can also be asked as "What is 85 percent times 90?" 85 percent is equivalent to the decimal 0.85. 90 times 0.85 = 76.5

the eisest way to find square root of something , is to see what number x itself = that number .... so EXAMPLE:what is the square root of 81? this is how you will find it.....so what number x itself gives me 81? it's 9 because 9x9=81 so the square root of 81 is 9

All you have to do is multiply the number 1360 by .9, because.9 is actually 90% is decimal form. I'll do the math here so you don't have to. 1360 x .9 = 1224 So, 90% of 1360 is 1224.