The multiplication of percentages is accomplished by converting the percentage to decimals, and multiplying the decimals. To convert a percentage to a decimal, the percent sign must be removed, and the number divided by 100. The decimal point should always be moved two places to the left when dividing by 100. After dividing 75 by 100, the answer is 0.75.
Know MoreThe decimal point will always move to the left for how many digits there are in the equation. For example, to multiply 75 percent by 20 percent, both would need to be divided by 100, to make the numbers 0.75 and 0.20. These two numbers need to be multiplied together, and the decimal point moved four places to the left, to correlate with how many numbers appear to the right of the decimal point. The answer before simplifying is .1500. Those last two zeroes can be removed, and the answer is .15.
To convert .15 into an actual percentage, instead of dividing by 100, a person should multiply by 100. The decimal points then move to the right, for an answer of 15 percent. When dividing, decimal points move to the left, and when multiplying, decimal points move to the right.
Learn more in Fractions & PercentagesThe leading digit in a decimal is the digit to the immediate left of the decimal point. If the decimal is less than one, the leading digit is the first non-zero digit to the right of a decimal point.
Full Answer >Decimals are important because people use them everyday in different situations, such as counting money, looking at price tags, reading an odometer and reviewing Olympic scores. The decimal system is a way to express large and small numbers by utilizing the decimal point.
Full Answer >Two-fifths is equivalent to 40 percent. Dividing the numerator, 2, by the denominator, 5, yields a decimal value of 0.40. Decimal values can be converted to percentages by multiplying by 100, which means that 0.40 is equal to 40 percent.
Full Answer >Subtracting decimals involves writing the two decimals one below the other and making sure that the decimal points line up before subtracting in the normal manner. However, the larger decimal should be placed above the smaller one. Similarly, if the two decimals do not have the same length, then add zeroes before subtracting them.
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