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# Who invented the decimal system?

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The decimal system was invented by Hindu mathematicians in India between the first and sixth centuries A.D. This system is sometimes also called the Hindu-Arabic numeral system because it was first introduced to Europeans by Arabs, who had acquired the system from the Hindus earlier.

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The decimal system has 10 as its base, and is sometimes known as a base-10 system. The system incorporates whole numbers and decimal fractions. Whole numbers appear before the period, and fractions appear as decimal digits after it. The position of every decimal digit is determined by the power to which the denominator, 10, is raised. For example, 6/10 and 6/100 are represented as 0.6 and 0.06 because 10 is raised to the power 1 and 2, respectively. The power corresponds with decimal position.

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## Related Questions

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Round a decimal to a specific place by looking at the digit to the immediate right. If that digit's value is less than five, the place value remains the same, but if it is five or greater, the place value increases by one. Digits to the right are then dropped.

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To round a decimal, identify the place value you want to round, which is referred to as the rounding digit. Identify the number immediately to the right of the rounding digit. If the number immediately to the right of the rounding digit is less than five, don't change the rounding digit, and drop all digits to the right. If the number to the right of the rounding digit is greater than five, add one to the rounding digit, and remove all digits to the right.

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To round to the nearest tenth of a percent, a person must reduce two or more decimal points to one decimal point. For instance, a percentage of 82.34 is rounded to 82.3 percent, because 82.34 is closer to 82.3 than 82.4.