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.
Continue ReadingThe 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 about Fractions & PercentagesTwo-thirds expressed as a decimal is 0.6, with a line over or under the six, indicating that the six repeats indefinitely, or as 0.666, which is accurate to three decimals. To convert a fraction to a decimal, divide the numerator, the top number, by the denominator, the bottom number.
Full Answer >To subtract decimals, stack both numbers so the decimal point is in the same position, and add zeros to the right of the number with fewer digits. Subtract as though they are whole numbers. The decimal point in the answer number goes directly under those in the subtraction problem.
Full Answer >Rounding decimals involves analyzing whether end numbers are above or below five. If a number is below five, then the number before may stay the same. If a number is above five, the number before it rounds up by one.
Full Answer >To multiply decimals, add up the number of decimal places, remove the decimal points and multiply the numbers. After calculating, place the decimal into the answer using the original number of added decimal places.
Full Answer >