The relationship between decimals, fractions, and percentages.

Fractions are the broad category of the three, and the denominator can be any positive integer. Decimal: A fraction whose denominator is ten, one hundred, one thousand... expressed in the form of digits is a decimal. For example, 0.2 is 2/10, and 0.57 is 57/100. Percent: A fraction whose denominator is 100. Usually expressed with a percent sign. Often used for comparison, not to express actual quantities. The first term of the ratio is equivalent to the numerator of the fraction and the dividend of the division. The latter term of the ratio is equivalent to the denominator of the fraction and the divisor of the division. The ratio of the ratio is equivalent to the fractional value of the fraction and the quotient of the division. There are both connections and differences between the law of constant quotient and the basic properties of fractions. According to the relationship between division and fractions, the quotient of dividing two numbers can be expressed as a fraction. The numerator of a fraction is equivalent to the dividend in division, the denominator of a fraction is equivalent to the divisor (except 0), and the value of the fraction is equivalent to the quotient. The law of invariance of quotients and the basic properties of fractions have the same effect in solving the size of problem evaluation. But they are different. First, the expression forms are different, one is in the form of division, and the other is in the form of fractions; second, the result obtained by applying the constant rule of quotient can be an integer or a decimal, etc., and The results obtained using the basic properties of fractions can only be expressed in the form of fractions.