Q: Why should there be percentages when a number can be expressed as a fraction or a decimal?

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A decimal rational number can be expressed as a fraction A decimal irrational number can not be expressed as a fraction

When a decimal can't be expressed as a fraction then it is an irrational number.

Because a terminating decimal is a rational number that can also be expressed as a fraction

The number 12.5 is already expressed as a decimal fraction. Expressed as a vulgar fraction, it is equal to 12 1/2, or twelve and a half.

If the decimal number can be expressed as a fraction (with one whole number over another), then it is a rational decimal number. So 7/5 is a rational number, and remains as such even if expressed in decimal form (of 1.4).

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A decimal rational number can be expressed as a fraction A decimal irrational number can not be expressed as a fraction

When a decimal can't be expressed as a fraction then it is an irrational number.

Any number that can be expressed as a fraction can also be expressed as a terminating decimal and a non terminating decimal can't be expressed as a fraction and so therefore it is an irrational number.

Any number that can be expressed as a fraction can also be expressed as a terminating decimal and a non terminating decimal can't be expressed as a fraction and so therefore it is an irrational number.

Because a terminating decimal is a rational number that can also be expressed as a fraction

The number 12.5 is already expressed as a decimal fraction. Expressed as a vulgar fraction, it is equal to 12 1/2, or twelve and a half.

Converts a dollar price expressed as a decimal number into a dollar price expressed as fraction. For example, Dollar in Decimal Number is 1.25, Fraction is 32, the Dollar in Fraction will be 1.08.

Convert the mixed number to an improper fraction. Any fraction can be expressed as a decimal by dividing the denominator into the numerator.

The number 1/8 is already expressed as a proper fraction. Expressed as a decimal fraction, it is equal to 0.125.

If the decimal number can be expressed as a fraction (with one whole number over another), then it is a rational decimal number. So 7/5 is a rational number, and remains as such even if expressed in decimal form (of 1.4).

0 of course.

Expressed as a decimal fraction, this is equal to 8.4.