Proportion is the proportion of the number of parts in a group to the total number. For example, there are 50 students in a class, including 25 boys and 25 girls. Ask for the proportion of boys. According to the definition, boys are required to account for the proportion of the total number of people, so divide 25 by 50 and the result is half! So do girls.

Tips: Usually, proportional questions are about scores, and what is the usual question and answer? Often we put the denominator after the word and the numerator before the word. For example, the above question requires the proportion of boys in the total number, then we take 50 as the denominator and 25 as the numerator, and get half!

And this percentage usually varies according to the score obtained. For example, the result obtained above is half, and the conversion to percentage is 50% (the method is to divide the numerator by the denominator to get a decimal, multiply the decimal by 100, and finally add a percentage sign to the number obtained after multiplying by 100 to get the final result! For example, the score of the above question is half, the numerator 1 is divided by the denominator 2 to get the decimal 0.5, the decimal 0.5 is multiplied by 100 to get 50, and the percentage sign is added to get 50%).