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If you just pull some numbers out of the air and practice with them, you'll discover
that whenever you multiply or divide a number by ten (10), you wind up with exactly
the same digits as you started with, and the only difference is that the decimal point
is moved over one place.
Knowing this trick, you should always keep it in your tool box. If you have to do
an arithmetic problem and it has a multiplication or division by 10 in it, you don't
have to go through the whole procedure. All you have to do is move the decimal
point over one place. (Of course, you also have to know which way to move it.)
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What is 14 times 25?
-14 x 2.5 = -3514x2.5_____70+ 280_____350 Since we are multiplying by decimals we need to look at the 2.5. The decimal moves over one space, so in our answer we need to move the decimal over one place. This makes the answer 35.0. Also since we were multiplying by a (-) we need to multiply 35.0 by (-) and get -35.0.
How do make a decimal a percent?
You move the decimal 2 places over.
What is 30 percent changed to a decimal is?
0.30 you move the decimal point over 2 times to the left to get the decimal. You move it over 2 times to the right to get the percent. IE. 5% = 0.05
How do you change the decimal 1.235 to a percent?
Move the decimal over two places, to get: 123.5%
What is 36.4 percent as a decimal?
0.364 ( move the decimal over two spaces to the left)
