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Q: What does moving a decimal point change?

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To change a decimal to a percentage, all you need to do is multiply it by 100. This is the same as moving the decimal point two spaces to the right. .453 = 45.3%

If we are moving from a large value to a small value we move the decimal point to the left.

Change 0.23 to a percent by moving the decimal point 2 places to the RIGHT and add the percent sign. 23%

change the fraction in to a decimal by dividing the numerator by the denominator . Then multiply by 100 (same as moving the decimal point left 2 places).

Moving from a smaller value to a larger value.

Moving the decimal point one place to the right is the same as multiplying both, he numerator and the denominator by 10. That is, you are effectively multiplying by 10/10 which equals 1. And since multiplication by 1 does not change the result, it is OK to do that. Similarly, moving two palces to the right is multiplying by 100/100. Similarly moving left.

Number to a multiple by a positive power of 10.

Moving from a smaller value to a larger value.

Move the decimal point one place to the right. If the decimal point is already at the end of the number, add a 0 to the extreme right before moving the decimal point.

Change % to decimal by dividing it by 100 or by simply moving the decimal point two places to the left. In this case, 30% will be equal to 0.3. Then divide.

Moving from a smaller value to a larger value.

.350

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