Percent Decimal

Percent To Decimal The Key to Convert Percent To Decimal… No Matter What Level of Math You’re In. Have you wondered how people can convert percent to decimal for so easy in math? The decimal numbering system uses ten symbols called digits, each digit representing a number in math. These symbols are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. The symbols are known as the numbers zero, one, two, three, etc. By using combinations of 10 symbols, an infinite amount of numbers can be created in math.

Percent To Decimal To convert a percent (%) to a decimal, we move the decimal point two places to the left and drop the % sign. (1) To convert 12.5% to a decimal, we would move the decimal point two places to the left and drop the % sign. 12.5% = .12 5% = .125 (2) Example: Convert 19.3% to a decimal. Move the decimal point  2 places to the left . Then drop the percent sign. 19.3% = 0.193 NOTE: If the percent does not have at least two digits to the left of the decimal point, put in zeros before proceeding. Example: Change .5% to a decimal. There are no digits to the left of the decimal point. We need two digits there. So we write .5% as 00.5% and then convert: 00.5% = .005   Example: Convert 2.3% to a decimal. There is only one digit to the left of the decimal point. We need two digits there. So we write 2.3% as 02.3%. Then we convert: 02.3% = 0.023   Now try the exercise below: Write the following percents as decimals. (1) 21% =___________________ (2) 2.1% =___________________ (3) .21% =___________________ (4) .05% =___________________ (5) 172% =___________________ (6) 5% =___________________ (7) 37.65% =___________________   ANSWERS: (1) .21 (2) .021 (3) .0021 (4) .0005 (5) 1.72 (6) .05 (7) .3765

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