1 1 The ratio of boys to girls is 2 3, with girls accounting for and boys accounting for .

1. (1) The ratio of boys to girls is 2:3, with girls accounting for (3 5) and boys accounting for (2 5).

2) The ratio of the circumference of the square to the length of the sides is (4:1), and the ratio of the circumference to the diameter of the circle is (V: 1).

3) The simplest ratio is (7:20).

4) If the edge-to-length ratio of two cubes is 3:1, then their surface area ratio is (9:1) and the volume ratio is (27:1).

5) The ratio of the radius of the two circles is 2:3, the ratio of diameter is (2:3), the ratio of circumference is (2:3), and the ratio of area is (4:9).

6) From 1 10 of the number of people transferred from class A to class B, the two classes are equal. It turns out that A and B are (11:9).

3. A batch of rice, 600 kilograms have been eaten, exactly 3 4 have been eaten, how many kilograms are left?

Divide 600 by 3 4 800 800 600 200

4. A computer is now 2 15 lower than the original price, just 800 yuan lower, how much is the original price? How much is the current price?

800 divided by 2 15 6000 6000 (1 2 15) 5200

5. 35 apples in each basket. After taking 5 pieces from A and putting them into B, what is the ratio of B to A?

Girls 2 5Boys 3 5

3.200 kg remaining.

4.The original price is 6000 yuan. Now 5200 yuan.

Is this an elementary school math problem -- today's kids can't afford to hurt and know how to use the Internet to do their homework.

I can't afford to hurt, I really can't afford to hurt.

20% more girls than boys (1-20%)=25%.

Male students account for (1-20%) 1+1-20%)=80% 180%=4 9

If there is anything unclear about this question, you can ask it,

A: Boys make up 60% of the class and girls make up 40% of the class

So the answer is: 60, 40

5 to 6 in five.

Sixth. The difference is three-quarters of the minus.

If there are x girls, there are 2 3x boys.

There are x+2 3x=5 3x students in the class.

So girls make up 1 5 3 = 3 5 in the class

Boys make up 2 3 5 3 = 2 5 in the class

If the boy is x, then the girl is (2 3x).

x+2/3x=1

5/3x=1

x=3 5 3 5 for boys and 2 5 for girls

Three-fifths two-fifths.

Girls make up 3 5 of the class, and boys make up 2 5 of the class

The number of girls at the banquet is 1, then the number of boys is: , Oak Lu.

<> A: Girls are <> of the class size

Therefore, b

Because both sentences regard the class size as a unit "1", 20% of its corresponding specific numbers are the number of boys more than girls;

Therefore, the male students have 20% more class size than the female students, and the female Duan Tsai students have 20% less class size than the male students, which is correct

Therefore, it is judged to be: correct attack and ignition.

Sixty per cent of the boys are right

Girls account for 40 per cent